de:wasserversorger-discover

Journal entry appended successfully. Final report:

Ran the wasserversorger-discover skill's phase-2b singleton sweep: two synchronous subagent shards researched 60 Gemeindeverband units (30 each), yielding 38 new water-supplier companies, 10 reused existing companies, and 12 honest unresolved gaps. After merge, population coverage rose from 99.4% to 99.53% (438 municipalities / 393.6k people still residual, 3,110 companies in the roster), with 0 new domain collisions introduced (standing backlog steady at 27). One process gap was found and documented: shard output filenames use HHMM without a date, which caused a (harmlessly self-caught) collision with yesterday's same-time run's leftover files — flagged in the journal for the naming convention to include the date going forward.

State on entry: picked up after the 21:06 chat-triggered run (99.21%→99.4%), 3035→3072 companies, 486 residual. Regenerated batch60-input.json fresh via build_batch60.mjs (did not trust the on-disk file, mtime 23:07 the prior night — correctly cautious per the skill's warning, though it turned out to be same-run leftover rather than stale).

Batch: 60 singleton units (all PHASE 2b, members_residual === 1), split 30/30 into two synchronous general-purpose subagents (run_in_background: false, mandatory no-Agent/Task line included), company_id ranges wv-de-19562–19591 (shard A) / wv-de-19592–19621 (shard B). Both completed inline within this turn (durations ~1117s / ~902s), no recursion into background sub-subagents observed.

New failure mode caught: HHMM-only shard filenames collide across days. Both shards' assigned output filenames (roster.part-shardA-2200.jsonl etc.) already existed on disk from the prior day's 2026-08-30 22:00 run, which used the same shardA-2200/shardB-2200 naming (HHMM only, no date). Both subagents caught this themselves, correctly appended rather than overwrote, and verified no AGS/domain overlap with the pre-existing content before finishing. No data was lost, but future runs should suffix shard filenames with the date, not just HHMM, since two different day's 22:00 runs are not distinguishable by time alone. Filed as a real gap in the convention, not just this run's oddity.

Shard A (30 units, Bayern/Hessen/Sachsen/BW/Brandenburg/Schleswig-Holstein/Thüringen): 17 new mints, 6 reused existing companies, 7 unresolved (Grainet, Weichering, Reichenschwand, Raisting, Mulda/Sa., Husby, Gefell — each with notes on what was checked). Self-caught three duplicate mints before merge via a full cross-shard + roster.jsonl domain-collision re-check (per the skill's mandatory last step): Nußdorf a.Inn (already wv-de-19548), Arnbachgruppe (already wv-de-2215), Adelburggruppe (already wv-de-975) — all three deleted and links repointed. Also caught a namesake trap: its first fetch for "Egling a.d.Paar" hit egling.de, a different Gemeinde Egling (Bad Tölz-Wolfratshausen, already in roster as part of Zweckverband Endlhauser Gruppe) — re-researched the correct egling.com and rewrote the row at lower confidence. Weichering: the Gemeinde's own site names Zweckverband Arnbachgruppe, but Arnbachgruppe's existing roster record (sourced from VG Schrobenhausen's authoritative page) explicitly excludes Weichering from its three-Gemeinde area — recorded unresolved rather than trusting the weaker signal.

Shard B (30 units, Bayern/Hessen/Sachsen/BW): 21 new mints, 4 reused existing companies, 5 unresolved (Wachenroth, Hohenfels, Lindberg, Langenaltheim, Ahorn). 18 of the 21 new mints are small-Gemeinde self-supply rows (own Eigenbetrieb, no distinct legal entity) — consistent with the campaign's established pattern that self-supply concentrates in the small-singleton tail. Two WebSearch-suggested Verband names (Schwarzachgruppe for Wachenroth, Eichstätter Berggruppe for Langenaltheim) were checked against the Verbände's own member lists and ruled out rather than trusted, leaving both honestly unresolved. Miltach's Satzung PDF was scanned/image-only with no pdftotext available in the environment — recorded at low confidence rather than fabricated. Deliberately did not link two Fernwasser wholesalers (FWF for Puschendorf, Waldwasser for Iggensbach/Neuschönau) since the roster convention links the retail consumer-facing supplier.

Validation before merge: both shards well-formed JSONL, all 60 assigned AGS present exactly once across the new link rows (48 resolved + 12 explicit unresolved). Cross-shard + full-roster domain-collision recheck (on official_domain, deduped by company_id per shard-merge semantics) run before consolidate_roster.mjs: 27 standing collisions (down from the last-reported 29 — likely natural churn from last-shard-wins re-resolution, not investigated further), 0 touching either new shard's mints.

Merge: map_roster.mjs: needs-review queue unchanged at 1231 (AGS-seeded rows don't feed it, as expected), total link rows 14703 → 14763 (+60 exact). consolidate_roster.mjs: 3072 → 3110 distinct companies (+38 = 17+21, exact). coverage.mjs: municipalities claimed 10457 → 10505 (+48, exact — 12 of 60 stayed unresolved). Population 99.4% → 99.53% (+0.13pp), residual 486 → 438 municipalities / 504.8k → 393.6k people. build_gv_layer.mjs: multi-member pool unchanged at 10 units/22 municipalities (still on hold), singletons 464 → 416 (-48, exact).

Crossed 99.5% population coverage.

For next run: continue singleton batches by residual_population descending — 416 singletons remain (largest ~6.6k, Schelklingen etc.). 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. Adopt dated shard filenames (e.g. shardA-20260901-2200) going forward to stop the HHMM collision from recurring — this run's collision was harmless only because both subagents independently checked and appended safely. Standing domain-collision backlog now 27 (eTLD+1, was 29), still awaiting the overdue human consolidation pass, along with the 6 standing duplicate-mint name pairs and the St. Peter/St. Märgen AGS-swap + wv-de-10532 hq_ags mismatch flagged in the prior entry (none touched this run). _tasks/netzbetreiber-contact/german-water/ remains absent from this checkout (noted every run, out of scope for discovery).