de:wasserversorger-discover

Journal updated. Final summary for the report.

Discovery run complete: population coverage rose from 99.70% to 99.78% (residual now 347 municipalities / 183.7k people, down from 384/248.6k), roster grew from 3,142 to 3,168 companies (+26 new mints across two synchronous shards covering 60 singleton units). Caught and fixed one real merge bug in-flight (a resolved link row that had a minted company but was left company_id: null, which would have silently under-counted coverage by 1 municipality) before consolidating; domain-collision backlog held steady at 28 (no new collisions introduced). The multi-member pool (10 units/22 municipalities) remains on hold pending an overdue human decision, and 325 singleton units remain for the next run.

Followed the skill's synchronous-shard protocol. Read CLAUDE.md and journal tail, then SKILL.md in full.

State on entry: 3142 roster companies, 99.70% coverage (10559/384 claimed/residual), 362 singletons remaining (largest Talheim ~5.1k), 10-unit/22-municipality multi-member pool still on hold pending the overdue human decision (left untouched again, correctly).

Batch build: deleted stale batch60-input.json and regenerated via build_batch60.mjs (60 singleton units, Breitenberg down to a Nordhalben tier). Split 30/30 into dated shard files batch60-shard{A,B}-20260901-0800.json. Max in-use company_id was 19679; assigned shard A the range wv-de-19700–19749, shard B wv-de-19750–19799 (generous non-overlapping headroom).

Dispatch: two synchronous general-purpose Agent subagents in one message, both run_in_background: false, both carrying the mandatory no-Agent/no-Task-tool line verbatim. Both completed inline (~901s / ~1119s), neither recursed into background sub-subagents.

Shard A (30 units): 10 new mints (wv-de-19700–19709), 7 reused, 13 unresolved. Two host/ namesake traps caught: gemeinde-breitenberg.de resolves to a different Breitenberg (Amt Breitenburg, Schleswig-Holstein, not the Bavarian target); Oberwiesenthal's "Stadtwerke Kurort Oberwiesenthal GmbH" is the old cable-car company, not water (real supplier Erzgebirge Trinkwasser GmbH, already in roster). Kößlarn, Schönau, Ebrach and Ernsgaden all correctly stayed unresolved on contradicted/partial evidence, independently reaching the same conclusions already on file for Ebrach/Ernsgaden from prior runs — a good cross-check.

Shard B (30 units): 16 new mints (wv-de-19750–19765), 4 reused, 10 unresolved. 8 of the 16 new mints are self_supplied Eigenbetriebe with direct "eigene Wasserversorgung" sourcing; 5 are Zweckverbände (3 pending_domain). New namesake trap: zweckverband-wasserversorgung.de looks right for "Konnersreuther Gruppe" but its Impressum actually names an unrelated Greding-area Verband — documented in the company's notes. Genuine Teilbereich fragmentation (no single verifiable whole-municipality entity) recorded for Schleching and Quarnbek rather than guessed.

Bug caught and fixed before merge: shard A minted wv-de-19703 (Gemeinde Hohenwarth Wasserversorgung) correctly, but its own link row for Hohenwarth (AGS 09372135) was left company_id: null with only a "See roster company wv-de-19703" note — a resolved municipality that would have silently stayed in the residual. Caught by diffing pre/post claimed-count deltas (60 assigned, 37 reported resolved, but coverage only picked up 36) against expected, then cross- checking every null-company_id link row whose notes referenced a wv-de- id versus one that didn't. The other four null-with-wv-de--in-notes rows (Kößlarn, Schönau, Ebrach, Ernsgaden) were confirmed genuine — the notes cite an existing company only to explain why it was ruled out, not as the answer. Fixed the one real case directly in the shard file (roster-links.part-shardA-20260901-0800.jsonl) before rerunning map_roster.mjs. Worth watching for in future merges: a subagent that writes "see roster company wv-de-NNNNN" in notes without also setting company_id accordingly is an easy, silent under-claim — a cheap check is comparing (assigned units) vs (resolved-per-report) vs (actual claimed delta) before trusting the coverage number.

Validation before merge: both shards well-formed JSONL (0 bad lines each, 17/20 lines). All 60 assigned AGS present exactly once across the combined links (37 resolved + 23 unresolved, after the Hohenwarth fix — was 36+24 before). One cross-shard company_id overlap (wv-de-3957, ZWA Hainichen) checked and confirmed to be legitimate independent reuse by both shards for different municipalities (Wechselburg / Kriebstein), not a duplicate mint — contents identical to the pre-existing roster record. Cross-shard + full-roster domain-collision recheck (eTLD+1, across every roster.part-*.jsonl + roster.jsonl, 158 files) run before consolidate_roster.mjs: 28 collisions, unchanged from the last-reported count — this batch introduced none.

Merge: map_roster.mjs: needs-review queue unchanged at 1236 (AGS-seeded rows don't feed it). consolidate_roster.mjs: 3142 → 3168 distinct companies (+26 = 10+16, exact). coverage.mjs: municipalities claimed 10559 → 10596 (+37, exact after the Hohenwarth fix). Population 99.70% → 99.78% (+0.08pp), residual 384 → 347 municipalities / 248.6k → 183.7k people. build_gv_layer.mjs: multi-member pool unchanged at 10 units/22 municipalities (still on hold), singletons 362 → 325 (-37, exact).

Crossed 99.78% population coverage.

For next run: continue singleton batches by residual_population descending — 325 singletons remain, largest still Talheim (~5.1k, unresolved in a prior run, worth a fresh look since the pool is shrinking). The 10-unit/22-municipality multi-member pool remains on hold pending the overdue human decision — do not spend a run on it without new information. Standing domain-collision backlog unchanged at 28, still awaiting the overdue human consolidation pass, along with the 6 standing duplicate-mint name pairs, the St. Peter/St. Märgen AGS-swap, and the wv-de-10532 hq_ags mismatch flagged in earlier entries (none touched this run). resolve_singleton.mjs's ENOENT dependency on the absent _tasks/netzbetreiber-contact/german-water/ directory presumably still unfixed (not re-checked this run, went straight to WebSearch/WebFetch per the established phase-2b fallback) — now flagged in four consecutive runs, worth an actual fix if a future run has slack. _tasks/netzbetreiber-contact/german-water/ remains absent from this checkout.