The file /root/traccar-geocoder/builder/tools/geocoder_diff.cpp has been updated successfully.

                if (differs) {
                    wval(corr_data, &cid, 8);

// geocoder-diff v3: Fully custom patch format using merge-sequence encoding.
//
// For each data file: walk old (string-remapped) and new in parallel,
// match records by content, emit MATCH/INSERT/DELETE operations.
// For entry/cell files: include changed cell entry data directly.
// geo_cells rebuilt by patch tool from entries (not delta-patched).
//
// Patch format: custom binary, zstd-compressed as a whole for transport.
//
// Usage: geocoder-diff <old-dir> <new-dir> -o <patch-file>

#include <algorithm>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <string>
#include <unistd.h>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#include "patch_format.h"

// --- Merge sequence encoding ---
// Walk two sorted arrays (old remapped, new), matching by record bytes.
// Emit: MATCH(n) = copy n records from old, INSERT(n,data) = add n new records,
//       DELETE(n) = skip n old records.

enum MergeOp : uint8_t { OP_MATCH_RUN = 0, OP_INSERT_RUN = 1, OP_DELETE_RUN = 2 };

struct MergeSequence {
    std::vector<char> data; // serialized ops

    void add_match(uint32_t count) {
        uint8_t op = OP_MATCH_RUN;
        data.insert(data.end(), (char*)&op, (char*)&op + 1);
        data.insert(data.end(), (char*)&count, (char*)&count + 4);
    }
    void add_delete(uint32_t count) {
        uint8_t op = OP_DELETE_RUN;
        data.insert(data.end(), (char*)&op, (char*)&op + 1);
        data.insert(data.end(), (char*)&count, (char*)&count + 4);
    }
    void add_insert(const char* records, uint32_t count, size_t stride) {
        uint8_t op = OP_INSERT_RUN;
        data.insert(data.end(), (char*)&op, (char*)&op + 1);
        data.insert(data.end(), (char*)&count, (char*)&count + 4);
        data.insert(data.end(), records, records + count * stride);
    }
};

// Build merge sequence for a data file.
// old_data has string remap already applied.
// Records are compared by byte equality (stride bytes).
static MergeSequence build_merge_seq(
    const std::vector<char>& old_data, const std::vector<char>& new_data,
    size_t stride)
{
    size_t old_n = old_data.size() / stride;
    size_t new_n = new_data.size() / stride;
    size_t oi = 0, ni = 0;
    MergeSequence seq;
    uint32_t match_run = 0, del_run = 0;

    auto flush_match = [&]() { if (match_run > 0) { seq.add_match(match_run); match_run = 0; } };
    auto flush_del = [&]() { if (del_run > 0) { seq.add_delete(del_run); del_run = 0; } };

    // For small strides (<=8), records aren't unique enough for hash matching.
    // Use simple sequential scan instead.
    bool use_hash = (stride > 8);

    // Pre-build hash index of new records for fast mismatch resolution
    auto record_hash = [&](const char* p, size_t s) -> uint64_t {
        uint64_t h = 14695981039346656037ULL;
        for (size_t i = 0; i < s; i++) { h ^= (uint8_t)p[i]; h *= 1099511628211ULL; }
        return h;
    };
    std::unordered_multimap<uint64_t, uint32_t> new_hash;
    if (use_hash) {
        new_hash.reserve(new_n);
        for (uint32_t i = 0; i < new_n; i++)
            new_hash.emplace(record_hash(new_data.data() + i * stride, stride), i);
    }

    while (oi < old_n && ni < new_n) {
        const char* op = old_data.data() + oi * stride;
        const char* np = new_data.data() + ni * stride;

        if (memcmp(op, np, stride) == 0) {
            flush_del();
            match_run++;
            oi++; ni++;
        } else if (use_hash) {
            // Hash-based mismatch resolution (for records with unique content)
            uint64_t oh = record_hash(op, stride);
            auto range = new_hash.equal_range(oh);
            uint32_t best_ni = UINT32_MAX;
            for (auto it = range.first; it != range.second; ++it) {
                if (it->second >= ni && it->second < ni + 10000 &&
                    memcmp(op, new_data.data() + it->second * stride, stride) == 0) {
                    if (it->second < best_ni) best_ni = it->second;
                }
            }
            if (best_ni != UINT32_MAX && best_ni > ni) {
                flush_match(); flush_del();
                seq.add_insert(new_data.data() + ni * stride, best_ni - ni, stride);
                ni = best_ni;
            } else if (best_ni == ni) {
                flush_del(); match_run++; oi++; ni++;
            } else {
                flush_match(); del_run++; oi++;
            }
        } else {
            // Sequential scan (for coordinate files where records aren't unique)
            size_t lookahead = std::min((size_t)200, std::min(old_n - oi, new_n - ni));
            bool found = false;
            for (size_t k = 1; k <= lookahead; k++) {
                if (ni + k < new_n && memcmp(op, new_data.data() + (ni + k) * stride, stride) == 0) {
                    flush_match(); flush_del();
                    seq.add_insert(new_data.data() + ni * stride, k, stride);
                    ni += k; found = true; break;
                }
                if (oi + k < old_n && memcmp(np, old_data.data() + (oi + k) * stride, stride) == 0) {
                    flush_match(); del_run += k; oi += k; found = true; break;
                }
            }
            if (!found) { flush_match(); del_run++; oi++; flush_del(); seq.add_insert(np, 1, stride); ni++; }
        }
    }

    flush_match(); flush_del();
    // Remaining old records: deletions
    if (oi < old_n) seq.add_delete(old_n - oi);
    // Remaining new records: insertions
    if (ni < new_n) seq.add_insert(new_data.data() + ni * stride, new_n - ni, stride);

    return seq;
}

// --- String remap ---

static std::unordered_map<uint32_t, uint32_t> build_string_remap(
    const std::vector<char>& old_pool, const std::vector<char>& new_pool)
{
    std::unordered_map<std::string, uint32_t> new_idx;
    size_t pos = 0;
    while (pos < new_pool.size()) {
        const char* s = new_pool.data() + pos;
        size_t len = strlen(s);
        new_idx[std::string(s, len)] = static_cast<uint32_t>(pos);
        pos += len + 1;
    }
    std::unordered_map<uint32_t, uint32_t> remap;
    pos = 0;
    while (pos < old_pool.size()) {
        const char* s = old_pool.data() + pos;
        size_t len = strlen(s);
        auto it = new_idx.find(std::string(s, len));
        if (it != new_idx.end())
            remap[static_cast<uint32_t>(pos)] = it->second;
        pos += len + 1;
    }
    return remap;
}

// --- Remap + fixup helpers ---

static void remap_addr_points(std::vector<char>& data, const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16)
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v); if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
}
static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                         const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v); if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

// Content matching for ways (by name + nodes, ignoring node_offset)
static uint64_t fnv_mix(uint64_t h, uint64_t v) { h ^= v; h *= 1099511628211ULL; return h; }

static void fixup_way_offsets(std::vector<char>& old_ways, const std::vector<char>& old_nodes,
                                const std::vector<char>& new_ways, const std::vector<char>& new_nodes,
                                size_t stride) {
    size_t name_off = (stride == 12) ? 8 : 5;
    size_t old_n = old_ways.size() / stride, new_n = new_ways.size() / stride;
    size_t old_nc = old_nodes.size() / 8, new_nc = new_nodes.size() / 8;

    auto way_hash = [&](const char* w, const char* nodes, size_t max_n) -> uint64_t {
        uint32_t node_offset, name_id; uint8_t node_count;
        memcpy(&node_offset, w, 4); node_count = (uint8_t)w[4]; memcpy(&name_id, w + name_off, 4);
        uint64_t h = 14695981039346656037ULL;
        h = fnv_mix(h, name_id); h = fnv_mix(h, node_count);
        for (uint8_t j = 0; j < node_count && (node_offset + j) < max_n; j++) {
            float lat, lng;
            memcpy(&lat, nodes + (node_offset + j) * 8, 4);
            memcpy(&lng, nodes + (node_offset + j) * 8 + 4, 4);
            h = fnv_mix(h, to_grid(lat)); h = fnv_mix(h, to_grid(lng));
        }
        return h;
    };

    std::unordered_multimap<uint64_t, uint32_t> new_map;
    new_map.reserve(new_n);
    for (uint32_t i = 0; i < new_n; i++)
        new_map.emplace(way_hash(new_ways.data() + i * stride, new_nodes.data(), new_nc), i);

    for (uint32_t i = 0; i < old_n; i++) {
        uint64_t h = way_hash(old_ways.data() + i * stride, old_nodes.data(), old_nc);
        auto it = new_map.find(h);
        if (it != new_map.end()) {
            // Fix node_offset to match new way
            uint32_t new_node_off;
            memcpy(&new_node_off, new_ways.data() + it->second * stride, 4);
            memcpy(old_ways.data() + i * stride, &new_node_off, 4);
            new_map.erase(it);
        }
    }
}

// Same for admin polygons (vertex_offset)
static void fixup_admin_offsets(std::vector<char>& old_polys, const std::vector<char>& old_verts,
                                  const std::vector<char>& new_polys, const std::vector<char>& new_verts,
                                  size_t stride) {
    size_t old_n = old_polys.size() / stride, new_n = new_polys.size() / stride;
    size_t old_vc = old_verts.size() / 8, new_vc = new_verts.size() / 8;

    auto poly_hash = [&](const char* p, const char* verts, size_t max_v) -> uint64_t {
        uint32_t vert_offset, vert_count, name_id;
        memcpy(&vert_offset, p, 4); memcpy(&vert_count, p + 4, 4); memcpy(&name_id, p + 8, 4);
        uint8_t level = (uint8_t)p[12]; uint16_t cc; memcpy(&cc, p + stride - 2, 2);
        uint64_t h = 14695981039346656037ULL;
        h = fnv_mix(h, name_id); h = fnv_mix(h, level); h = fnv_mix(h, cc); h = fnv_mix(h, vert_count);
        for (uint32_t j = 0; j < std::min(vert_count, 10u) && (vert_offset + j) < max_v; j++) {
            float lat, lng;
            memcpy(&lat, verts + (vert_offset + j) * 8, 4); memcpy(&lng, verts + (vert_offset + j) * 8 + 4, 4);
            h = fnv_mix(h, to_grid(lat)); h = fnv_mix(h, to_grid(lng));
        }
        return h;
    };

    std::unordered_multimap<uint64_t, uint32_t> new_map;
    new_map.reserve(new_n);
    for (uint32_t i = 0; i < new_n; i++)
        new_map.emplace(poly_hash(new_polys.data() + i * stride, new_verts.data(), new_vc), i);

    for (uint32_t i = 0; i < old_n; i++) {
        uint64_t h = poly_hash(old_polys.data() + i * stride, old_verts.data(), old_vc);
        auto it = new_map.find(h);
        if (it != new_map.end()) {
            uint32_t new_vert_off;
            memcpy(&new_vert_off, new_polys.data() + it->second * stride, 4);
            memcpy(old_polys.data() + i * stride, &new_vert_off, 4);
            new_map.erase(it);
        }
    }
}

// Same for interp ways
static void fixup_interp_offsets(std::vector<char>& old_data, const std::vector<char>& old_nodes,
                                   const std::vector<char>& new_data, const std::vector<char>& new_nodes,
                                   size_t stride) {
    size_t street_off = (stride >= 20) ? 8 : 5;
    size_t old_n = old_data.size() / stride, new_n = new_data.size() / stride;
    size_t old_nc = old_nodes.size() / 8, new_nc = new_nodes.size() / 8;

    auto ihash = [&](const char* p, const char* nodes, size_t max_n) -> uint64_t {
        uint32_t node_offset, street_id, start, end; uint8_t count, itype;
        memcpy(&node_offset, p, 4); count = (uint8_t)p[4];
        memcpy(&street_id, p + street_off, 4); memcpy(&start, p + street_off + 4, 4);
        memcpy(&end, p + street_off + 8, 4);
        itype = (street_off + 12 < stride) ? (uint8_t)p[street_off + 12] : 0;
        uint64_t h = 14695981039346656037ULL;
        h = fnv_mix(h, street_id); h = fnv_mix(h, start); h = fnv_mix(h, end);
        h = fnv_mix(h, itype); h = fnv_mix(h, count);
        for (uint8_t j = 0; j < count && (node_offset + j) < max_n; j++) {
            float lat, lng;
            memcpy(&lat, nodes + (node_offset + j) * 8, 4); memcpy(&lng, nodes + (node_offset + j) * 8 + 4, 4);
            h = fnv_mix(h, to_grid(lat)); h = fnv_mix(h, to_grid(lng));
        }
        return h;
    };

    std::unordered_multimap<uint64_t, uint32_t> new_map;
    new_map.reserve(new_n);
    for (uint32_t i = 0; i < new_n; i++)
        new_map.emplace(ihash(new_data.data() + i * stride, new_nodes.data(), new_nc), i);
    for (uint32_t i = 0; i < old_n; i++) {
        uint64_t h = ihash(old_data.data() + i * stride, old_nodes.data(), old_nc);
        auto it = new_map.find(h);
        if (it != new_map.end()) {
            uint32_t new_off; memcpy(&new_off, new_data.data() + it->second * stride, 4);
            memcpy(old_data.data() + i * stride, &new_off, 4);
            new_map.erase(it);
        }
    }
}

// --- Derive ID remap from merge sequence (same logic as patch tool) ---
static std::vector<uint32_t> derive_id_remap_from_merge(
    const MergeSequence& seq, size_t old_count, size_t stride)
{
    std::vector<uint32_t> id_map(old_count, 0xFFFFFFFF);
    size_t pos = 0, old_rec = 0, new_rec = 0;
    while (pos < seq.data.size()) {
        uint8_t op = static_cast<uint8_t>(seq.data[pos]); pos++;
        uint32_t count; memcpy(&count, seq.data.data() + pos, 4); pos += 4;
        if (op == OP_MATCH_RUN) {
            for (uint32_t k = 0; k < count; k++)
                if (old_rec + k < id_map.size())
                    id_map[old_rec + k] = static_cast<uint32_t>(new_rec + k);
            old_rec += count; new_rec += count;
        } else if (op == OP_INSERT_RUN) {
            pos += count * stride;
            new_rec += count;
        } else if (op == OP_DELETE_RUN) {
            old_rec += count;
        }
    }
    return id_map;
}

// --- Write helpers ---
static void wval(std::vector<char>& buf, const void* data, size_t size) {
    buf.insert(buf.end(), (const char*)data, (const char*)data + size);
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-diff <old-dir> <new-dir> -o <patch-file>" << std::endl;
        return 1;
    }
    std::string old_dir = argv[1], new_dir = argv[2], patch_path = argv[4];
    std::string tmpdir = "/tmp/geocoder-diff-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    // Build string remap
    std::cerr << "Building string remap..." << std::endl;
    auto old_strings = read_file(old_dir + "/strings.bin");
    auto new_strings = read_file(new_dir + "/strings.bin");
    auto str_remap = build_string_remap(old_strings, new_strings);

    // Detect strides
    auto detect = [](const std::string& path, std::vector<size_t> cs) -> size_t {
        auto d = read_file(path);
        for (size_t s : cs) if (d.size() % s == 0 && d.size() > 0) return s;
        return cs[0];
    };
    size_t way_stride = detect(old_dir + "/street_ways.bin", {12, 9});
    size_t interp_stride = detect(old_dir + "/interp_ways.bin", {24, 20, 18});
    size_t admin_stride = detect(old_dir + "/admin_polygons.bin", {24, 20, 19});

    // Build patch data (uncompressed, will be zstd-compressed at the end)
    std::vector<char> patch;
    patch.insert(patch.end(), GCPATCH_MAGIC, GCPATCH_MAGIC + 8);
    uint32_t ver = 2, flags = 0; // version 2 = custom format
    wval(patch, &ver, 4); wval(patch, &flags, 4);

    // --- Section: String remap ---
    {
        std::vector<std::pair<uint32_t,uint32_t>> entries;
        size_t pos = 0;
        while (pos < old_strings.size()) {
            uint32_t old_off = static_cast<uint32_t>(pos);
            auto it = str_remap.find(old_off);
            entries.push_back({old_off, (it != str_remap.end()) ? it->second : old_off});
            pos += strlen(old_strings.data() + pos) + 1;
        }
        uint32_t marker = 0xFFFFFFFE, count = static_cast<uint32_t>(entries.size());
        wval(patch, &marker, 4); wval(patch, &count, 4);
        for (auto& [o, n] : entries) { wval(patch, &o, 4); wval(patch, &n, 4); }
        std::cerr << "  String remap: " << count << " entries (" << count * 8 << " bytes)" << std::endl;
    }

    // --- Section: Per-file merge sequences ---
    // Track fixups per file (applied before merge, included in patch for patch tool)
    std::unordered_map<uint32_t, std::vector<std::pair<uint32_t,uint32_t>>> file_fixups;

    // Stored merge sequences for ID remap derivation
    std::unordered_map<uint32_t, MergeSequence> stored_merges;

    auto write_merge = [&](PatchFileId id, const std::string& name,
                             const std::vector<char>& old_data, const std::vector<char>& new_data,
                             size_t stride) {
        auto seq = build_merge_seq(old_data, new_data, stride);
        stored_merges[static_cast<uint32_t>(id)] = seq; // store for entry rebuild
        uint32_t fid = static_cast<uint32_t>(id);
        uint64_t os = old_data.size(), ns = new_data.size(), ss = seq.data.size();

        // Check for fixups
        auto fit = file_fixups.find(fid);
        uint32_t n_fixups = fit != file_fixups.end() ? static_cast<uint32_t>(fit->second.size()) : 0;

        wval(patch, &fid, 4);
        uint32_t st = static_cast<uint32_t>(stride);
        wval(patch, &st, 4);
        wval(patch, &os, 8); wval(patch, &ns, 8);
        // Fixup count + data before merge sequence
        wval(patch, &n_fixups, 4);
        if (n_fixups > 0) {
            for (auto& [idx, val] : fit->second) { wval(patch, &idx, 4); wval(patch, &val, 4); }
        }
        wval(patch, &ss, 8);
        patch.insert(patch.end(), seq.data.begin(), seq.data.end());
        std::cerr << "  " << name << ": seq=" << ss << " fixups=" << n_fixups
                  << " (" << std::fixed << std::setprecision(2)
                  << (ns > 0 ? ss * 100.0 / ns : 0) << "%)" << std::endl;
    };

    // strings.bin: full replacement (byte-level merge is inefficient for string pools)
    {
        uint32_t fid = static_cast<uint32_t>(PatchFileId::STRINGS);
        uint32_t st = 0; // full replacement
        uint64_t os = 0, ns = new_strings.size();
        uint32_t nfix = 0;
        uint64_t ss = new_strings.size();
        wval(patch, &fid, 4); wval(patch, &st, 4);
        wval(patch, &os, 8); wval(patch, &ns, 8);
        wval(patch, &nfix, 4); wval(patch, &ss, 8);
        patch.insert(patch.end(), new_strings.begin(), new_strings.end());
        std::cerr << "  strings.bin: full " << new_strings.size() << " bytes" << std::endl;
    }

    // addr_points.bin
    {
        auto old_data = read_file(old_dir + "/addr_points.bin");
        remap_addr_points(old_data, str_remap);
        auto new_data = read_file(new_dir + "/addr_points.bin");
        write_merge(PatchFileId::ADDR_POINTS, "addr_points.bin", old_data, new_data, 16);
    }

    // street_ways.bin (string remap + offset fixup for node_offset)
    {
        auto old_w = read_file(old_dir + "/street_ways.bin");
        remap_field(old_w, way_stride, way_stride == 12 ? 8 : 5, str_remap);
        auto new_w = read_file(new_dir + "/street_ways.bin");
        auto old_n = read_file(old_dir + "/street_nodes.bin");
        auto new_n = read_file(new_dir + "/street_nodes.bin");
        // Record fixups: (record_index, new_node_offset)
        auto& fixups = file_fixups[static_cast<uint32_t>(PatchFileId::STREET_WAYS)];
        // Save old offsets, apply fixups, then record changes
        size_t wn = old_w.size() / way_stride;
        std::vector<uint32_t> old_offsets(wn);
        for (size_t i = 0; i < wn; i++) memcpy(&old_offsets[i], old_w.data() + i * way_stride, 4);
        fixup_way_offsets(old_w, old_n, new_w, new_n, way_stride);
        for (size_t i = 0; i < wn; i++) {
            uint32_t new_off; memcpy(&new_off, old_w.data() + i * way_stride, 4);
            if (new_off != old_offsets[i]) fixups.push_back({static_cast<uint32_t>(i), new_off});
        }
        write_merge(PatchFileId::STREET_WAYS, "street_ways.bin", old_w, new_w, way_stride);
    }

    // street_nodes.bin (no remap)
    {
        auto old_data = read_file(old_dir + "/street_nodes.bin");
        auto new_data = read_file(new_dir + "/street_nodes.bin");
        write_merge(PatchFileId::STREET_NODES, "street_nodes.bin", old_data, new_data, 8);
    }

    // interp_ways.bin
    {
        auto old_data = read_file(old_dir + "/interp_ways.bin");
        auto new_idata = read_file(new_dir + "/interp_ways.bin");
        // Zero padding bytes for deterministic comparison
        if (interp_stride == 24) {
            for (size_t i = 0; i + interp_stride <= old_data.size(); i += interp_stride) {
                memset(old_data.data() + i + 5, 0, 3);  // after node_count
                memset(old_data.data() + i + 21, 0, 3);  // after interpolation
            }
            for (size_t i = 0; i + interp_stride <= new_idata.size(); i += interp_stride) {
                memset(new_idata.data() + i + 5, 0, 3);
                memset(new_idata.data() + i + 21, 0, 3);
            }
        }
        remap_field(old_data, interp_stride, interp_stride >= 20 ? 8 : 5, str_remap);
        auto old_n = read_file(old_dir + "/interp_nodes.bin");
        auto& new_data = new_idata; // use padding-zeroed version
        auto new_n = read_file(new_dir + "/interp_nodes.bin");
        auto& fixups = file_fixups[static_cast<uint32_t>(PatchFileId::INTERP_WAYS)];
        size_t in_count = old_data.size() / interp_stride;
        std::vector<uint32_t> old_offsets(in_count);
        for (size_t i = 0; i < in_count; i++) memcpy(&old_offsets[i], old_data.data() + i * interp_stride, 4);
        fixup_interp_offsets(old_data, old_n, new_data, new_n, interp_stride);
        for (size_t i = 0; i < in_count; i++) {
            uint32_t new_off; memcpy(&new_off, old_data.data() + i * interp_stride, 4);
            if (new_off != old_offsets[i]) fixups.push_back({static_cast<uint32_t>(i), new_off});
        }
        write_merge(PatchFileId::INTERP_WAYS, "interp_ways.bin", old_data, new_data, interp_stride);
    }

    // interp_nodes.bin
    {
        auto old_data = read_file(old_dir + "/interp_nodes.bin");
        auto new_data = read_file(new_dir + "/interp_nodes.bin");
        write_merge(PatchFileId::INTERP_NODES, "interp_nodes.bin", old_data, new_data, 8);
    }

    // admin_polygons.bin
    {
        auto old_data = read_file(old_dir + "/admin_polygons.bin");
        auto new_data = read_file(new_dir + "/admin_polygons.bin");
        // Zero padding bytes (offset 13-15 between admin_level and area) for deterministic comparison
        if (admin_stride == 24) {
            for (size_t i = 0; i + admin_stride <= old_data.size(); i += admin_stride)
                memset(old_data.data() + i + 13, 0, 3);
            for (size_t i = 0; i + admin_stride <= new_data.size(); i += admin_stride)
                memset(new_data.data() + i + 13, 0, 3);
        }
        remap_field(old_data, admin_stride, 8, str_remap);
        auto old_v = read_file(old_dir + "/admin_vertices.bin");
        auto new_v = read_file(new_dir + "/admin_vertices.bin");
        auto& fixups = file_fixups[static_cast<uint32_t>(PatchFileId::ADMIN_POLYGONS)];
        size_t an = old_data.size() / admin_stride;
        std::vector<uint32_t> old_offsets(an);
        for (size_t i = 0; i < an; i++) memcpy(&old_offsets[i], old_data.data() + i * admin_stride, 4);
        fixup_admin_offsets(old_data, old_v, new_data, new_v, admin_stride);
        for (size_t i = 0; i < an; i++) {
            uint32_t new_off; memcpy(&new_off, old_data.data() + i * admin_stride, 4);
            if (new_off != old_offsets[i]) fixups.push_back({static_cast<uint32_t>(i), new_off});
        }
        write_merge(PatchFileId::ADMIN_POLYGONS, "admin_polygons.bin", old_data, new_data, admin_stride);
    }

    // admin_vertices.bin
    {
        auto old_data = read_file(old_dir + "/admin_vertices.bin");
        auto new_data = read_file(new_dir + "/admin_vertices.bin");
        write_merge(PatchFileId::ADMIN_VERTICES, "admin_vertices.bin", old_data, new_data, 8);
    }

    // --- Section: Entry/cell files as full new data ---
    // These are small relative to data files and rebuilt by patch tool isn't reliable.
    // Include them as full replacement. zstd transport compression handles the rest.
    // Entry/cell files: NOT included.
    // The patch tool reconstructs them from the derived ID remaps
    // (extracted implicitly from the merge sequences above).
    // geo_cells.bin, admin_cells.bin, and all entry files are rebuilt.
    std::cerr << "  (entry/cell files: omitted, rebuilt by patch tool)" << std::endl;

    // Include cell_id changes for entry reconstruction
    {
        // Geo cell changes
        auto new_geo = read_file(new_dir + "/geo_cells.bin");
        auto old_geo = read_file(old_dir + "/geo_cells.bin");
        std::unordered_set<uint64_t> old_set, new_set;
        for (size_t i = 0; i < old_geo.size() / 20; i++) {
            uint64_t c; memcpy(&c, old_geo.data() + i * 20, 8); old_set.insert(c);
        }
        for (size_t i = 0; i < new_geo.size() / 20; i++) {
            uint64_t c; memcpy(&c, new_geo.data() + i * 20, 8); new_set.insert(c);
        }
        std::vector<uint64_t> g_added, g_removed;
        for (auto c : new_set) if (!old_set.count(c)) g_added.push_back(c);
        for (auto c : old_set) if (!new_set.count(c)) g_removed.push_back(c);
        std::sort(g_added.begin(), g_added.end());
        std::sort(g_removed.begin(), g_removed.end());

        uint32_t marker = CELL_CHANGES_GEO_MARKER;
        uint32_t na = g_added.size(), nr = g_removed.size();
        wval(patch, &marker, 4); wval(patch, &na, 4); wval(patch, &nr, 4);
        for (auto c : g_added) wval(patch, &c, 8);
        for (auto c : g_removed) wval(patch, &c, 8);
        std::cerr << "  Geo cell changes: +" << na << " -" << nr << " ("
                  << (na + nr) * 8 << " bytes)" << std::endl;

        // Admin cell changes
        auto new_ac = read_file(new_dir + "/admin_cells.bin");
        auto old_ac = read_file(old_dir + "/admin_cells.bin");
        old_set.clear(); new_set.clear();
        for (size_t i = 0; i < old_ac.size() / 12; i++) {
            uint64_t c; memcpy(&c, old_ac.data() + i * 12, 8); old_set.insert(c);
        }
        for (size_t i = 0; i < new_ac.size() / 12; i++) {
            uint64_t c; memcpy(&c, new_ac.data() + i * 12, 8); new_set.insert(c);
        }
        std::vector<uint64_t> a_added, a_removed;
        for (auto c : new_set) if (!old_set.count(c)) a_added.push_back(c);
        for (auto c : old_set) if (!new_set.count(c)) a_removed.push_back(c);
        std::sort(a_added.begin(), a_added.end());
        std::sort(a_removed.begin(), a_removed.end());

        marker = CELL_CHANGES_ADMIN_MARKER;
        na = a_added.size(); nr = a_removed.size();
        wval(patch, &marker, 4); wval(patch, &na, 4); wval(patch, &nr, 4);
        for (auto c : a_added) wval(patch, &c, 8);
        for (auto c : a_removed) wval(patch, &c, 8);
        std::cerr << "  Admin cell changes: +" << na << " -" << nr << std::endl;

        // Derive ID remaps from stored merge sequences (same as patch tool does)
        auto derive_remap = [&](PatchFileId id, size_t old_size, size_t stride) -> std::unordered_map<uint32_t,uint32_t> {
            auto it = stored_merges.find(static_cast<uint32_t>(id));
            if (it == stored_merges.end()) return {};
            auto vec = derive_id_remap_from_merge(it->second, old_size / stride, stride);
            std::unordered_map<uint32_t,uint32_t> m;
            for (uint32_t i = 0; i < vec.size(); i++)
                if (vec[i] != 0xFFFFFFFF) m[i] = vec[i];
            return m;
        };

        auto w_rm_d = derive_remap(PatchFileId::STREET_WAYS,
            read_file(old_dir + "/street_ways.bin").size(), way_stride);
        auto a_rm_d = derive_remap(PatchFileId::ADDR_POINTS,
            read_file(old_dir + "/addr_points.bin").size(), 16);
        auto i_rm_d = derive_remap(PatchFileId::INTERP_WAYS,
            read_file(old_dir + "/interp_ways.bin").size(), interp_stride);
        auto ad_rm_d = derive_remap(PatchFileId::ADMIN_POLYGONS,
            read_file(old_dir + "/admin_polygons.bin").size(), admin_stride);

        // Rebuild entries using derived remaps (same as patch tool)
        auto old_se2 = read_file(old_dir + "/street_entries.bin");
        auto old_ae2 = read_file(old_dir + "/addr_entries.bin");
        auto old_ie2 = read_file(old_dir + "/interp_entries.bin");
        auto derived = rebuild_geo_from_remap(old_geo, old_se2, old_ae2, old_ie2,
                                               w_rm_d, a_rm_d, i_rm_d, g_added, g_removed);
        auto old_admc = read_file(old_dir + "/admin_cells.bin");
        auto old_adme = read_file(old_dir + "/admin_entries.bin");
        auto admin_derived = rebuild_admin_from_remap(old_admc, old_adme, ad_rm_d);

        // Cell-level entry corrections: compare derived vs new entries cell by cell.
        // Include only cells whose entry data differs.
        // This is fully custom — no zstd, no temp files.
        auto write_entry_correction = [&](PatchFileId fid, const std::string& fname,
                                           const std::vector<char>& derived_entries,
                                           const std::vector<char>& derived_cells, size_t cell_stride,
                                           size_t offset_pos) {
            auto new_entries = read_file(new_dir + "/" + fname);
            auto new_cells_data = read_file(new_dir + "/" +
                (fid == PatchFileId::ADMIN_ENTRIES ? "admin_cells.bin" : "geo_cells.bin"));

            // Parse both derived and new entries by cell
            auto parse_all = [](const std::vector<char>& cells, size_t stride, size_t off_pos,
                                 const std::vector<char>& entries)
                -> std::vector<std::pair<uint64_t, std::vector<uint32_t>>>
            {
                size_t n = cells.size() / stride;
                std::vector<std::pair<uint64_t, std::vector<uint32_t>>> result;
                result.reserve(n);
                for (size_t i = 0; i < n; i++) {
                    uint64_t cid; memcpy(&cid, cells.data() + i * stride, 8);
                    uint32_t off; memcpy(&off, cells.data() + i * stride + off_pos, 4);
                    std::vector<uint32_t> ids;
                    if (off != 0xFFFFFFFF && off + 2 <= entries.size()) {
                        uint16_t count; memcpy(&count, entries.data() + off, 2);
                        if (off + 2 + count * 4 <= entries.size()) {
                            ids.resize(count);
                            memcpy(ids.data(), entries.data() + off + 2, count * 4);
                        }
                    }
                    result.push_back({cid, std::move(ids)});
                }
                return result;
            };

            auto derived_parsed = parse_all(derived_cells, cell_stride, offset_pos, derived_entries);
            auto new_parsed = parse_all(new_cells_data,
                cell_stride == 12 ? 12 : 20,
                cell_stride == 12 ? 8 : offset_pos,
                new_entries);

            // Build new cell map for lookup
            std::unordered_map<uint64_t, const std::vector<uint32_t>*> new_map;
            for (auto& [cid, ids] : new_parsed) new_map[cid] = &ids;

            // Find differing cells
            std::vector<char> corr_data;
            uint32_t diff_count = 0;
            for (auto& [cid, d_ids] : derived_parsed) {
                auto it = new_map.find(cid);
                const std::vector<uint32_t>* n_ids = nullptr;
                if (it != new_map.end()) n_ids = it->second;

                bool differs = false;
                if (!n_ids) { differs = !d_ids.empty(); }
                else if (d_ids.size() != n_ids->size()) { differs = true; }
                else if (!d_ids.empty() && memcmp(d_ids.data(), n_ids->data(), d_ids.size() * 4) != 0) { differs = true; }

                if (differs) {
                    // Include this cell's correct entry
                    uint32_t ci = static_cast<uint32_t>(&cid - &derived_parsed[0].first);
                    // Find the index in derived_parsed
                    for (size_t idx = 0; idx < derived_parsed.size(); idx++) {
                        if (&derived_parsed[idx] == &std::make_pair(cid, d_ids)) break; // won't work
                    }
                    // Use linear search for cell index
                    wval(corr_data, &cid, 8);
                    uint16_t count = n_ids ? static_cast<uint16_t>(n_ids->size()) : 0;
                    wval(corr_data, &count, 2);
                    if (n_ids && !n_ids->empty())
                        corr_data.insert(corr_data.end(), (const char*)n_ids->data(),
                                        (const char*)n_ids->data() + n_ids->size() * 4);
                    diff_count++;
                }
            }
            // Also check for cells only in new (not in derived)
            std::unordered_set<uint64_t> derived_set;
            for (auto& [cid, _] : derived_parsed) derived_set.insert(cid);
            for (auto& [cid, ids] : new_parsed) {
                if (!derived_set.count(cid) && !ids.empty()) {
                    wval(corr_data, &cid, 8);
                    uint16_t count = static_cast<uint16_t>(ids.size());
                    wval(corr_data, &count, 2);
                    corr_data.insert(corr_data.end(), (const char*)ids.data(),
                                    (const char*)ids.data() + ids.size() * 4);
                    diff_count++;
                }
            }

            uint32_t marker = ENTRY_CORRECTION_MARKER;
            uint32_t file = static_cast<uint32_t>(fid);
            wval(patch, &marker, 4);
            wval(patch, &file, 4);
            wval(patch, &diff_count, 4);
            patch.insert(patch.end(), corr_data.begin(), corr_data.end());
            std::cerr << "  " << fname << ": " << diff_count << " cell corrections ("
                      << corr_data.size() << " bytes)" << std::endl;
        };

        // Geo entries: street, addr, interp
        write_entry_correction(PatchFileId::STREET_ENTRIES, "street_entries.bin",
            derived.street_entries_data, derived.geo_cells_data, 20, 8);
        write_entry_correction(PatchFileId::ADDR_ENTRIES, "addr_entries.bin",
            derived.addr_entries_data, derived.geo_cells_data, 20, 12);
        write_entry_correction(PatchFileId::INTERP_ENTRIES, "interp_entries.bin",
            derived.interp_entries_data, derived.geo_cells_data, 20, 16);
        // Admin entries
        write_entry_correction(PatchFileId::ADMIN_ENTRIES, "admin_entries.bin",
            admin_derived.admin_entries_data, admin_derived.admin_cells_data, 12, 8);

        // Cell flag corrections: identify cells whose has_street/has_addr/has_interp
        // flags differ between old and new. Only ~3K cells typically.
        // The patch tool uses these to correctly assign entry offsets during geo_cells rebuild.
        {
            auto new_geo_data = read_file(new_dir + "/geo_cells.bin");
            std::unordered_map<uint64_t, uint8_t> old_cell_flags;
            for (size_t i = 0; i < old_geo.size() / 20; i++) {
                uint64_t cid; memcpy(&cid, old_geo.data() + i * 20, 8);
                uint32_t s, a, ip;
                memcpy(&s, old_geo.data()+i*20+8, 4); memcpy(&a, old_geo.data()+i*20+12, 4);
                memcpy(&ip, old_geo.data()+i*20+16, 4);
                uint8_t flags = (s != 0xFFFFFFFF ? 1 : 0) | (a != 0xFFFFFFFF ? 2 : 0) | (ip != 0xFFFFFFFF ? 4 : 0);
                old_cell_flags[cid] = flags;
            }
            std::vector<std::pair<uint64_t, uint8_t>> flag_corrections;
            for (size_t i = 0; i < new_geo_data.size() / 20; i++) {
                uint64_t cid; memcpy(&cid, new_geo_data.data() + i * 20, 8);
                uint32_t s, a, ip;
                memcpy(&s, new_geo_data.data()+i*20+8, 4); memcpy(&a, new_geo_data.data()+i*20+12, 4);
                memcpy(&ip, new_geo_data.data()+i*20+16, 4);
                uint8_t new_flags = (s != 0xFFFFFFFF ? 1 : 0) | (a != 0xFFFFFFFF ? 2 : 0) | (ip != 0xFFFFFFFF ? 4 : 0);
                auto it = old_cell_flags.find(cid);
                uint8_t old_f = (it != old_cell_flags.end()) ? it->second : 0;
                if (new_flags != old_f)
                    flag_corrections.push_back({cid, new_flags});
            }
            uint32_t fm = CELL_FLAGS_MARKER;
            uint32_t fc = static_cast<uint32_t>(flag_corrections.size());
            wval(patch, &fm, 4); wval(patch, &fc, 4);
            for (auto& [cid, flags] : flag_corrections) {
                wval(patch, &cid, 8); wval(patch, &flags, 1);
            }
            std::cerr << "  Cell flag corrections: " << fc << " cells ("
                      << fc * 9 << " bytes)" << std::endl;
        }

        if (false) { // disabled: correction approach doesn't produce matching rebuilds
        // Rebuild geo_cells from NEW entry files (which the patch tool will have after corrections)
        // using the derived cell structure. This produces a nearly-correct geo_cells.
        auto rebuild_geo_from_entries = [&](const std::vector<char>& derived_geo,
                                             const std::string& se_path, const std::string& ae_path,
                                             const std::string& ie_path) -> std::vector<char> {
            auto se = read_file(se_path), ae = read_file(ae_path), ie = read_file(ie_path);
            auto build_offsets = [](const std::vector<char>& ef) -> std::vector<uint32_t> {
                std::vector<uint32_t> offs; uint32_t p = 0;
                while (p + 2 <= ef.size()) { offs.push_back(p); uint16_t c; memcpy(&c, ef.data()+p, 2); p += 2+c*4; }
                return offs;
            };
            auto so = build_offsets(se), ao = build_offsets(ae), io = build_offsets(ie);
            size_t n = derived_geo.size() / 20, si = 0, ai = 0, ii = 0;
            uint32_t no_data = 0xFFFFFFFF;
            std::vector<char> result(derived_geo.size());
            for (size_t c = 0; c < n; c++) {
                memcpy(result.data() + c*20, derived_geo.data() + c*20, 8);
                uint32_t os, oa, oi;
                memcpy(&os, derived_geo.data()+c*20+8, 4); memcpy(&oa, derived_geo.data()+c*20+12, 4);
                memcpy(&oi, derived_geo.data()+c*20+16, 4);
                uint32_t ns = (os != no_data && si < so.size()) ? so[si++] : no_data;
                uint32_t na = (oa != no_data && ai < ao.size()) ? ao[ai++] : no_data;
                uint32_t ni = (oi != no_data && ii < io.size()) ? io[ii++] : no_data;
                memcpy(result.data()+c*20+8, &ns, 4); memcpy(result.data()+c*20+12, &na, 4);
                memcpy(result.data()+c*20+16, &ni, 4);
            }
            return result;
        };

        // For geo_cells: rebuild from new entries + derived cell structure
        auto geo_from_new_entries = rebuild_geo_from_entries(derived.geo_cells_data,
            new_dir + "/street_entries.bin", new_dir + "/addr_entries.bin", new_dir + "/interp_entries.bin");

        for (auto& [c_fid, c_label, c_data, c_fname] : std::vector<std::tuple<PatchFileId, std::string, std::vector<char>*, std::string>>{
            {PatchFileId::GEO_CELLS, "geo_cells", &geo_from_new_entries, "geo_cells.bin"},
            {PatchFileId::ADMIN_CELLS, "admin_cells", &admin_derived.admin_cells_data, "admin_cells.bin"}})
        {
            auto c_new_data = read_file(new_dir + "/" + c_fname);
            std::string c_ref = tmpdir + "/cell_" + c_label + ".ref";
            std::string c_zst = tmpdir + "/cell_" + c_label + ".zst";
            write_file(c_ref, *c_data);
            system(("zstd --patch-from='" + c_ref + "' '" + new_dir + "/" + c_fname +
                    "' -o '" + c_zst + "' -f --quiet 2>/dev/null").c_str());
            auto c_zst_data = read_file(c_zst);
            uint32_t cf = static_cast<uint32_t>(c_fid), c_st = 0xFE;
            uint64_t c_rs = c_data->size(), c_ns = c_new_data.size();
            uint32_t c_nfix = 0; uint64_t c_ds = c_zst_data.size();
            wval(patch, &cf, 4); wval(patch, &c_st, 4);
            wval(patch, &c_rs, 8); wval(patch, &c_ns, 8);
            wval(patch, &c_nfix, 4); wval(patch, &c_ds, 8);
            patch.insert(patch.end(), c_zst_data.begin(), c_zst_data.end());
            std::cerr << "  " << c_fname << ": correction " << c_ds << " bytes ("
                      << std::fixed << std::setprecision(2)
                      << (c_ns > 0 ? c_ds * 100.0 / c_ns : 0) << "%)" << std::endl;
            remove(c_ref.c_str()); remove(c_zst.c_str());
        }
    } } // end disabled correction block

    if (false) // disabled — entry files not included
    for (auto& [id, name] : std::vector<std::pair<PatchFileId, std::string>>{
        {PatchFileId::GEO_CELLS, "geo_cells.bin"}}) {
        auto data = read_file(new_dir + "/" + name);
        uint32_t fid = static_cast<uint32_t>(id);
        uint32_t st = 0; // stride 0 = full replacement
        uint64_t os = 0, ns = data.size();
        uint32_t nfix = 0;
        uint64_t ss = data.size();
        wval(patch, &fid, 4); wval(patch, &st, 4);
        wval(patch, &os, 8); wval(patch, &ns, 8);
        wval(patch, &nfix, 4); // no fixups
        wval(patch, &ss, 8);   // data size
        patch.insert(patch.end(), data.begin(), data.end());
        std::cerr << "  " << name << ": full " << data.size() << " bytes" << std::endl;
    }

    // End marker
    uint32_t end_marker = 0xFFFFFFFF;
    wval(patch, &end_marker, 4);

    std::cerr << "\nUncompressed patch: " << patch.size() << " bytes ("
              << patch.size() / 1024 / 1024 << " MiB)" << std::endl;

    // Compress whole patch with zstd for transport
    {
        std::string raw_path = tmpdir + "/patch.raw";
        write_file(raw_path, patch);
        std::string cmd = "zstd -19 '" + raw_path + "' -o '" + patch_path + "' -f --quiet 2>/dev/null";
        system(cmd.c_str());
        auto compressed = read_file(patch_path);
        std::cerr << "Compressed patch: " << compressed.size() << " bytes ("
                  << compressed.size() / 1024 / 1024 << " MiB)" << std::endl;
        remove(raw_path.c_str());
    }

    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());
    return 0;
}

-                    // Include this cell's correct entry

-                    uint32_t ci = static_cast<uint32_t>(&cid - &derived_parsed[0].first);

-                    // Find the index in derived_parsed

-                    for (size_t idx = 0; idx < derived_parsed.size(); idx++) {

-                        if (&derived_parsed[idx] == &std::make_pair(cid, d_ids)) break; // won't work

-                    // Use linear search for cell index


Bash

cmake --build build -j$(nproc) --target geocoder-diff --target geocoder-patch 2>&1 | grep -E "(error:|Built)" | head -5

Build


[100%] Built target geocoder-diff
[100%] Built target geocoder-patch


Both build. Now let me test on planet first (the failing case), then Europe:


sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-diff /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/ 2>&1 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
echo "=== Planet test with custom cell corrections ==="
rm -f ~/planet-patch3.gcpatch
time ~/geocoder-diff ~/planet-old ~/planet-new -o ~/planet-patch3.gcpatch 2>&1 | grep -E "(seq=|correction|Compressed|flag|full )"
echo "Patch: $(ls -lh ~/planet-patch3.gcpatch | awk "{print \$5}")"
echo ""
rm -rf ~/planet-patched3
time ~/geocoder-patch ~/planet-old ~/planet-patch3.gcpatch -o ~/planet-patched3 2>&1 | grep -E "(correction|Rebuilt|FAIL|applied)"
echo ""
all_match=true
for f in ~/planet-new/*.bin; do
    b=$(basename $f); p=~/planet-patched3/$b
    [ -f "$p" ] && cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: FAIL"; all_match=false; }
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
' 2>&1

Planet test with custom cell corrections


Error: Exit code 1
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
scp: dest open "./geocoder-diff": Failure
scp: failed to upload file /root/traccar-geocoder/builder/build/geocoder-diff to ~/


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'rm -f ~/geocoder-diff ~/geocoder-patch' 2>&1 && sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-diff /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/ 2>&1

Force deploy


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
echo "=== Planet test with custom cell corrections ==="
rm -f ~/planet-patch3.gcpatch
nohup bash -c "
time ~/geocoder-diff ~/planet-old ~/planet-new -o ~/planet-patch3.gcpatch 2>&1
echo \"Patch: \$(ls -lh ~/planet-patch3.gcpatch | awk \"{print \\\$5}\")\"
echo \"\"
rm -rf ~/planet-patched3
time ~/geocoder-patch ~/planet-old ~/planet-patch3.gcpatch -o ~/planet-patched3 2>&1
echo \"\"
all_match=true
for f in ~/planet-new/*.bin; do
    b=\$(basename \$f); p=~/planet-patched3/\$b
    [ -f \"\$p\" ] && cmp -s \"\$f\" \"\$p\" && echo \"  \$b: MATCH\" || { echo \"  \$b: FAIL\"; all_match=false; }
done
\$all_match && echo \"ALL FILES MATCH\" || echo \"SOME DIFFER\"
" > ~/planet-test4.log 2>&1 &
echo "Running (PID $!). Monitor: tail -f ~/planet-test4.log"
' 2>&1

Start planet test in background


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
=== Planet test with custom cell corrections ===
Running (PID 143858). Monitor: tail -f ~/planet-test4.log


Running. This will take ~30 min (diff + patch). Let me commit while waiting:


git add tools/geocoder_diff.cpp tools/geocoder_patch.cpp tools/patch_format.h && git commit -m "$(cat <<'EOF'
feat: custom cell-level entry corrections (no more zstd --patch-from)

Replaced zstd-based entry corrections with fully custom cell-level
diffs. The diff tool compares derived vs new entries cell by cell,
includes only cells that differ. The patch tool applies corrections
by replacing specific cells' entry data and rebuilding offsets.

This eliminates all zstd --patch-from usage for entry/cell files.
Only zstd remaining: transport compression of the whole patch file.

ENTRY_CORRECTION_MARKER format:
  marker(4) + file_id(4) + count(4) +
  [cell_id(8) + entry_count(2) + ids(4*count)] per cell

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
EOF
)"

Commit custom cell corrections


[main 6738cc7] feat: custom cell-level entry corrections (no more zstd --patch-from)
 3 files changed, 230 insertions(+), 48 deletions(-)


sleep 1800 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'tail -30 ~/planet-test4.log' 2>&1

Check planet results after 30 min


The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.

Note: The user's next message may contain a correction or preference. Pay close attention — if they explain what went wrong or how they'd prefer you to work, consider saving that to memory for future sessions.


[Request interrupted by user for tool use]


<task-notification>
<task-id>b6of2t7to</task-id>
<tool-use-id>toolu_01HGEVYnFVAiFSVkLLFs5n9H</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/b6of2t7to.output</output-file>
<status>completed</status>
<summary>Background command "Planet test with full-replacement fallback" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/b6of2t7to.output


<task-notification>
<task-id>bmcpb8mi4</task-id>
<tool-use-id>toolu_01Y1XFk3iWJoZe6XpG9HHREp</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bmcpb8mi4.output</output-file>
<status>completed</status>
<summary>Background command "Debug planet diff derivation" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bmcpb8mi4.output


[Request interrupted by user]


Remember we can test completely new concepts with europe before running full planet to speed up iteration. We only need to run full planet at the end to validate the same concepts work with that


Good call. Let me check the planet test result, then switch to testing on Europe for faster iteration.


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'tail -20 ~/planet-test4.log 2>/dev/null' 2>&1

Check planet test status


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Building string remap...
  String remap: 11880682 entries (95045456 bytes)
  strings.bin: full 214686859 bytes
  addr_points.bin: seq=7864192 fixups=0 (0.31%)
  street_ways.bin: seq=5182592 fixups=47652566 (0.90%)
  street_nodes.bin: seq=1321957549 fixups=0 (33.36%)
  interp_ways.bin: seq=2563 fixups=71650 (0.15%)
  interp_nodes.bin: seq=3537 fixups=0 (0.10%)
  admin_polygons.bin: seq=205093 fixups=944305 (0.90%)
  admin_vertices.bin: seq=1503658628 fixups=0 (209.84%)
  (entry/cell files: omitted, rebuilt by patch tool)
  Geo cell changes: +158871 -45983 (1638832 bytes)
  Admin cell changes: +8 -8


Still running the diff. Let me kill it and test on Europe first — much faster iteration:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
kill $(pgrep -f "geocoder-diff.*planet") 2>/dev/null
echo "Planet diff killed. Testing on Europe..."
rm -f ~/test-eu-cell.gcpatch
time ~/geocoder-diff ~/det-A ~/det-today -o ~/test-eu-cell.gcpatch 2>&1 | grep -E "(seq=|correction|flag|full |Compressed)"
echo "Patch: $(ls -lh ~/test-eu-cell.gcpatch | awk "{print \$5}")"
echo ""
rm -rf ~/patched-eu-cell
time ~/geocoder-patch ~/det-A ~/test-eu-cell.gcpatch -o ~/patched-eu-cell 2>&1 | grep -E "(correction|Rebuilt|applied|FAIL)"
echo ""
all_match=true
for f in ~/det-today/*.bin; do
    b=$(basename $f); p=~/patched-eu-cell/$b
    [ -f "$p" ] && cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: FAIL"; all_match=false; }
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
' 2>&1

Test custom cell corrections on Europe (fast iteration)


Error: Exit code 255
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.


sleep 10 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
pkill -f "geocoder-diff.*planet" 2>/dev/null; sleep 2
echo "Testing Europe..."
rm -f ~/test-eu-cell.gcpatch
time ~/geocoder-diff ~/det-A ~/det-today -o ~/test-eu-cell.gcpatch 2>&1
echo "Patch: $(ls -lh ~/test-eu-cell.gcpatch | awk "{print \$5}")"
echo ""
rm -rf ~/patched-eu-cell
time ~/geocoder-patch ~/det-A ~/test-eu-cell.gcpatch -o ~/patched-eu-cell 2>&1
echo ""
all_match=true
for f in ~/det-today/*.bin; do
    b=$(basename $f); p=~/patched-eu-cell/$b
    [ -f "$p" ] && cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: FAIL"; all_match=false; }
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
' 2>&1

Europe test with cell corrections


SSH timing out — the planet diff is consuming all resources. Let me wait for it to finish or be killed:


sleep 30 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" -o ConnectTimeout=10 michtest@100.113.88.121 'pkill -9 -f "geocoder-diff.*planet" 2>/dev/null; echo ok' 2>&1

Force kill planet diff


sleep 60 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" -o ConnectTimeout=15 michtest@100.113.88.121 'pkill -9 geocoder; echo connected' 2>&1

Wait and retry kill


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
connected


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
echo "=== Europe test with custom cell corrections ==="
rm -f ~/test-eu-cell.gcpatch
time ~/geocoder-diff ~/det-A ~/det-today -o ~/test-eu-cell.gcpatch 2>&1
echo ""
echo "Patch: $(ls -lh ~/test-eu-cell.gcpatch | awk "{print \$5}")"
echo ""
rm -rf ~/patched-eu-cell
time ~/geocoder-patch ~/det-A ~/test-eu-cell.gcpatch -o ~/patched-eu-cell 2>&1
echo ""
all_match=true
for f in ~/det-today/*.bin; do
    b=$(basename $f); p=~/patched-eu-cell/$b
    [ -f "$p" ] && cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: FAIL"; all_match=false; }
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
' 2>&1

Europe test


Command running in background with ID: biqsfrv4x. Output is being written to: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/biqsfrv4x.output


sleep 300 && cat /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/biqsfrv4x.output 2>/dev/null | tail -30

Check Europe results


  Rebuilt 3 entry files + geo_cells
  Rebuilt admin_entries + admin_cells
Applying cell-level entry corrections...
  admin_entries.bin: applied 22669 cell corrections (22669 total)
  interp_entries.bin: applied 47 cell corrections (47 total)
  addr_entries.bin: applied 82622 cell corrections (82622 total)
  street_entries.bin: applied 689179 cell corrections (689179 total)
  Rebuilt geo_cells from corrected entries
  Rebuilt admin_cells.bin from corrected entries (1692000 bytes)
Patch applied. Output in /home/michtest/patched-eu-cell

real	3m1.226s
user	2m48.482s
sys	0m11.919s
  addr_entries.bin: MATCH
  addr_points.bin: MATCH
  admin_cells.bin: MATCH
  admin_entries.bin: MATCH
  admin_polygons.bin: MATCH
  admin_vertices.bin: MATCH
  geo_cells.bin: MATCH
  interp_entries.bin: MATCH
  interp_nodes.bin: MATCH
  interp_ways.bin: MATCH
  street_entries.bin: MATCH
  street_nodes.bin: MATCH
  street_ways.bin: MATCH
  strings.bin: MATCH
ALL FILES MATCH


**ALL 14 FILES MATCH on Europe!** Custom cell corrections work. Now let me check the patch size and run the full planet test:


cat /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/biqsfrv4x.output 2>/dev/null | grep -E "(Patch:|seq=|correction|flag|Compressed)"

Get Europe patch details


=== Europe test with custom cell corrections ===
  addr_points.bin: seq=4405789 fixups=0 (0.32%)
  street_ways.bin: seq=2714467 fixups=19361289 (1.16%)
  street_nodes.bin: seq=406430518 fixups=0 (28.11%)
  interp_ways.bin: seq=545 fixups=13395 (0.16%)
  interp_nodes.bin: seq=2085 fixups=0 (0.29%)
  admin_polygons.bin: seq=95018 fixups=449047 (0.88%)
  admin_vertices.bin: seq=82859535 fixups=0 (28.48%)
  street_entries.bin: 689179 cell corrections (11348074 bytes)
  addr_entries.bin: 82622 cell corrections (2146952 bytes)
  interp_entries.bin: 47 cell corrections (702 bytes)
  admin_entries.bin: 22669 cell corrections (1557726 bytes)
  Cell flag corrections: 83178 cells (748602 bytes)
Compressed patch: 195400062 bytes (186 MiB)
Patch: 187M
  Entry correction for file 9: 689179 cells
  Entry correction for file 10: 82622 cells
  Entry correction for file 11: 47 cells
  Entry correction for file 13: 22669 cells
  Cell flag corrections: 83178 cells
Applying cell-level entry corrections...
  admin_entries.bin: applied 22669 cell corrections (22669 total)
  interp_entries.bin: applied 47 cell corrections (47 total)
  addr_entries.bin: applied 82622 cell corrections (82622 total)
  street_entries.bin: applied 689179 cell corrections (689179 total)


**Europe 6-day gap: 187 MiB, all 14 files MATCH.** The cell corrections are:
- street_entries: 689K cells, 11 MiB
- addr_entries: 83K cells, 2 MiB
- admin_entries: 23K cells, 1.6 MiB
- interp_entries: 47 cells, 702 bytes

That's a lot of cell corrections (689K for streets). For a 6-day gap with 80K unmatched ways, that's expected — each unmatched way affects multiple cells.

Now let me run planet. It'll take ~30 min but should work with the same approach:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
nohup bash -c "
echo \"=== Planet test with custom cell corrections ===\"
rm -f ~/planet-patch4.gcpatch
time ~/geocoder-diff ~/planet-old ~/planet-new -o ~/planet-patch4.gcpatch 2>&1
echo \"Patch: \$(ls -lh ~/planet-patch4.gcpatch | awk \"{print \\\$5}\")\"
echo \"\"
rm -rf ~/planet-patched4
time ~/geocoder-patch ~/planet-old ~/planet-patch4.gcpatch -o ~/planet-patched4 2>&1
echo \"\"
all_match=true
for f in ~/planet-new/*.bin; do
    b=\$(basename \$f); p=~/planet-patched4/\$b
    [ -f \"\$p\" ] && cmp -s \"\$f\" \"\$p\" && echo \"  \$b: MATCH\" || { echo \"  \$b: FAIL\"; all_match=false; }
done
\$all_match && echo \"ALL FILES MATCH\" || echo \"SOME DIFFER\"
" > ~/planet-test5.log 2>&1 &
echo "Running (PID $!)"
' 2>&1

Start planet test in background


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Running (PID 144267)


Planet running. ~30 min. Let me commit and update PATCHING.md while waiting:


git add tools/geocoder_diff.cpp tools/geocoder_patch.cpp tools/patch_format.h && git commit -m "$(cat <<'EOF'
feat: custom cell corrections verified on Europe (187 MiB, all MATCH)

Cell-level entry corrections now fully custom — no zstd --patch-from.
The diff compares derived vs new entries cell by cell, includes only
differing cells. The patch applies corrections directly.

Europe 6-day gap: 187 MiB, all 14 files MATCH
  Entry corrections: 689K street + 83K addr + 23K admin cells
  Total correction data: ~15 MiB

Planet test running in background (~30 min).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
EOF
)"

Commit Europe-verified cell corrections


Error: Exit code 1
On branch main
Your branch is ahead of 'origin/main' by 24 commits.
  (use "git push" to publish your local commits)

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   tools/simplification_map.html

Untracked files:
  (use "git add <file>..." to include in what will be committed)
	build-presplit/
	test/deep_compare.cpp
	test/monaco_osmium_reference.txt
	test/name_overlap.py
	tools/comparison.geojson
	tools/full_remap_test.cpp
	tools/remap_test.cpp
	tools/simplification_viewer.html

no changes added to commit (use "git add" and/or "git commit -a")


Already committed. Let me check the planet progress:


sleep 1800 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'tail -25 ~/planet-test5.log' 2>&1

Check planet after 30 min


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
=== Planet test with custom cell corrections ===
Building string remap...
  String remap: 11880682 entries (95045456 bytes)
  strings.bin: full 214686859 bytes
  addr_points.bin: seq=7864192 fixups=0 (0.31%)
  street_ways.bin: seq=5182592 fixups=47652566 (0.90%)
  street_nodes.bin: seq=1321957549 fixups=0 (33.36%)
  interp_ways.bin: seq=2563 fixups=71650 (0.15%)
  interp_nodes.bin: seq=3537 fixups=0 (0.10%)
  admin_polygons.bin: seq=205093 fixups=944305 (0.90%)
  admin_vertices.bin: seq=1503658628 fixups=0 (209.84%)
  (entry/cell files: omitted, rebuilt by patch tool)
  Geo cell changes: +158871 -45983 (1638832 bytes)
  Admin cell changes: +8 -8
  street_entries.bin: 1909260 cell corrections (30894764 bytes)
  addr_entries.bin: 147310 cell corrections (3659084 bytes)


Still computing corrections. Let me wait longer:


sleep 600 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'tail -25 ~/planet-test5.log' 2>&1

Check planet results


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
=== Planet test with custom cell corrections ===
Building string remap...
  String remap: 11880682 entries (95045456 bytes)
  strings.bin: full 214686859 bytes
  addr_points.bin: seq=7864192 fixups=0 (0.31%)
  street_ways.bin: seq=5182592 fixups=47652566 (0.90%)
  street_nodes.bin: seq=1321957549 fixups=0 (33.36%)
  interp_ways.bin: seq=2563 fixups=71650 (0.15%)
  interp_nodes.bin: seq=3537 fixups=0 (0.10%)
  admin_polygons.bin: seq=205093 fixups=944305 (0.90%)
  admin_vertices.bin: seq=1503658628 fixups=0 (209.84%)
  (entry/cell files: omitted, rebuilt by patch tool)
  Geo cell changes: +158871 -45983 (1638832 bytes)
  Admin cell changes: +8 -8
  street_entries.bin: 1909260 cell corrections (30894764 bytes)
  addr_entries.bin: 147310 cell corrections (3659084 bytes)
  interp_entries.bin: 278 cell corrections (4436 bytes)
  admin_entries.bin: 368095 cell corrections (12033814 bytes)
  Cell flag corrections: 213321 cells (1919889 bytes)

Uncompressed patch: 3588105980 bytes (3421 MiB)


Diff done! 3.4 GiB uncompressed. zstd compression running. Let me wait for the full result:


sleep 600 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'tail -20 ~/planet-test5.log' 2>&1

Check for final results


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
    Applied 71650 fixups
  interp_ways.bin: 1748136 bytes (mapped 72762/72817 IDs)
  interp_nodes.bin: 3482208 bytes
    Applied 944305 fixups
  admin_polygons.bin: 22749720 bytes (mapped 942473/947358 IDs)
  admin_vertices.bin: 716567440 bytes
  Geo cell changes: +158871 -45983
  Admin cell changes: +8 -8
  Entry correction for file 9: 1909260 cells
  Entry correction for file 10: 147310 cells
  Entry correction for file 11: 278 cells
  Entry correction for file 13: 368095 cells
  Cell flag corrections: 213321 cells
Reconstructing entry/cell files from derived ID remaps...
  Rebuilt 3 entry files + geo_cells
  Rebuilt admin_entries + admin_cells
Applying cell-level entry corrections...
  admin_entries.bin: applied 368087 cell corrections (368095 total)
  interp_entries.bin: applied 278 cell corrections (278 total)
  addr_entries.bin: applied 147310 cell corrections (147310 total)


Patch application running. Let me wait for verification:


sleep 600 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'tail -25 ~/planet-test5.log' 2>&1

Wait for planet verification


<system-reminder>This is a side question from the user. You must answer this question directly in a single response.

IMPORTANT CONTEXT:
- You are a separate, lightweight agent spawned to answer this one question
- The main agent is NOT interrupted - it continues working independently in the background
- You share the conversation context but are a completely separate instance
- Do NOT reference being interrupted or what you were "previously doing" - that framing is incorrect

CRITICAL CONSTRAINTS:
- You have NO tools available - you cannot read files, run commands, search, or take any actions
- This is a one-off response - there will be no follow-up turns
- You can ONLY provide information based on what you already know from the conversation context
- NEVER say things like "Let me try...", "I'll now...", "Let me check...", or promise to take any action
- If you don't know the answer, say so - do not offer to look it up or investigate

Simply answer the question with the information you have.</system-reminder>

why is the diff so big, 3.4GB seems huge


The 3.4 GiB **uncompressed** is mostly from two things:

1. **admin_vertices.bin merge: 1.5 GiB (210%)** — the sequential merge's 200-record lookahead can't handle planet-scale vertex shifts. When admin polygons are reordered, their vertex blocks shift by thousands of positions, causing every vertex to be encoded as DELETE+INSERT instead of MATCH. The merge sequence is literally bigger than the file itself.

2. **street_nodes.bin merge: 1.3 GiB (33%)** — same issue at smaller scale. The sequential merge (used for 8-byte coordinate records since they're not unique enough for hash matching) has limited lookahead.

3. **Entry corrections: ~47 MiB** — 1.9M street cells + 147K addr + 368K admin cells that differ between derived and new.

4. **String remap + fixup tables: ~240 MiB** raw

After zstd transport compression the 3.4 GiB should compress to maybe ~800-900 MiB. The admin_vertices and street_nodes merge sequences have lots of repeated coordinate data that compresses well.

The fix for the big items: use hash-based matching for vertex/node files too (grouping by parent polygon/way rather than individual 8-byte records), or increase the sequential lookahead significantly for planet. For Europe these files are much smaller relative to the dataset so they don't dominate as much.