de:wasserversorger-discover

Journal entry appended. Final report:

Completed phase-2a batch 13 of the wasserversorger discovery campaign: 2 synchronous subagents resolved all 60 assigned singleton municipalities (14,091–15,443 residents each), minting 48 new companies plus bonus harvest of 22 more municipalities from member lists. Population coverage rose 75.79% → 77.02% (+1.23pp), municipalities claimed 6,738 → 6,815; the orchestrator-level domain-collision check found only the same 3 pre-existing accepted collisions and zero new duplicates. Phase-2a pool now down to 316 units/3.71M people (next up: Bovenden); flagged one filter-column bug in the queue-building logic (members_residual===1 vs. the correct members_total===1) for future runs to avoid.

Started by listing the campaign directory and checking file mtimes against the last journal entry (the 2026-08-26 22:00 run), per that entry's own advice — found no orphaned shards this time: the newest roster.part-*.jsonl/roster-links.part-*.jsonl files (p2y, p2z, p2aa) all predate roster.jsonl's own merge timestamp (00:21 on 08-27), consistent with that run simply taking until just past midnight to finish (60 units at ~2h15 est., started 22:00) rather than a second abandoned attempt. Recomputed the pool fresh via coverage.mjs + build_gv_layer.mjs anyway rather than trusting the handoff number, per the 13:00 2026-08-26 run's hard lesson: got 379 units / 4.63M people, top entry Schwalbach am Taunus 15,443 — matched the prior run's handoff exactly, so no correction needed this time, but the discipline of re-deriving it is what would have caught it if not. (One thing worth flagging for future runs: filtering by members_residual===1 instead of members_total===1 on gemeindeverband-queue.csv silently pulls in mostly-claimed multi-member units with one straggler left — e.g. it surfaced "VVG der Stadt Bietigheim-Bissingen" at 43,556 residents as a false top-of-pool entry. The correct phase-2a filter is members_total===1, i.e. true one-Gemeinde administrative units, not "one member left." Caught this myself before dispatching the batch by cross-checking against the journaled handoff number; a future run computing the pool from scratch without that cross-check could pick the wrong column and misorder the whole queue.)

Took the top 60 of the freshly-computed pool: Schwalbach am Taunus (15,443) down to Schwentinental (14,091). Split 2 SYNCHRONOUS subagents (p3a / p3b, 30 cities each, run_in_background: false, dispatched together in one message so both were blocked on within this turn), both carrying the required "you may not use the Agent/Task tool... do not end your turn until output files exist" line verbatim, plus the "grep the full candidate company name, not fragments" line. Both finished cleanly on the first try, no delegation, no background children — 11th consecutive clean batch, no recursion. Non-overlapping company_id ranges (3870–3919 / 3920–3969).

All 60 resolved, 0 unresolved, 1 pending_domain (WVE Wasserversorgungs- und -entsorgungs- gesellschaft Schriesheim mbH — confirmed by name/HRB/address via the City of Schriesheim's own site, no independently resolvable company website). 48 new companies minted across both shards (26 in p3a, 22 in p3b; several IDs left unused in each range after self-caught dedup), the rest matched to pre-existing roster companies. A real near-miss the self-check caught working as designed: p3a's seeded city Homberg (Efze) and p3b's bonus-harvested member-list entry for the same town were both being resolved concurrently under different shards; p3a's own domain-collision self-check (run before finalizing, not just once) found p3b's freshly-written wv-de-3923 (Wasser­verband Gruppenwasserwerk Fritzlar-Homberg, minted from p3b's Fritzlar/Homberg wholesale member list) already on disk and reused it instead of minting a second row — this is exactly the two-adjacent-shards collision risk the skill's banner describes, caught this time because both shards ran their self-check more than once rather than only at the very end. Bonus harvest beyond the 60: 6 municipalities from Wasserversorgungsverband Obere Schussentalgruppe (Bad Waldsee, Wolfegg, Aulendorf, Bergatreute, Kißlegg, Laimbach & Stuben), 1 from SWN Neustadt b.Coburg (Oberwasungen), 11 from Wasserverband Gruppenwasserwerk Fritzlar-Homberg's member list, and 4 from Wasserbeschaffungs- verband Riedgruppe Ost (Einhausen, Bensheim, Zwingenberg, Landkreis Bergstraße).

One data hazard caught and correctly resolved: two distinct German towns are both named "Erbach" — Erbach (Odenwald), Hessen (its own AöR, wasserversorgung-erbach.de) vs. the assigned Erbach (Donau), Baden-Württemberg AGS 08425039 (self-supplied, erbach-donau.de). p3b caught the conflation via postal code and Aufsichtsbehörde before writing, flagged in both the company and link row notes. Also recorded: Schwentinental's two Ortsteile (Raisdorf, Klausdorf) have different suppliers (new local Stadtwerke vs. a concession to Stadtwerke Kiel AG to 2039) — two paired link rows with quartier set, not one claim. Wilsdruff's supplier changed Jan 2025 (WVW GmbH) — recorded current, noted the change. Two 403-blocked Impressum pages (Avacon Wasser GmbH, Stadtwerke Dorfen GmbH) corroborated via northdata/creditreform register mirrors instead, flagged confidence: medium per the evidence rules rather than treated as primary-source.

Ran the mandatory orchestrator-level post-merge domain-collision check myself regardless of what either shard reported: across all 59 roster.part-*.jsonl shards plus roster.jsonl (1,150 distinct domains), found only the same 3 pre-existing accepted collisions (sw-augsburg.de, vgem-boos.de, emkendorf.de) and zero new ones — confirmed p3a's self-caught Homberg (Efze) reuse actually held and no other cross-shard duplicate slipped through.

Ran the Finish sequence: map_roster.mjs (7,537 links total, 69 unmatched + 3 ambiguous — mostly Ortsteil/administrative carve-outs with no AGS by construction, e.g. Kürten-Bechen, Puchheim-Bahnhof, several Saarland Ortsteile, plus a genuine 2-way ambiguous "Breitenbrunn" (2 Bayern Gemeinden) newly seen this run alongside the recurring 3-way "Steinbach" — both correctly left unmatched rather than guessed) → consolidate_roster.mjs (1,280 distinct companies, up from 1,232; 6 shard-level duplicates resolved by last-shard-wins, verified all 6 pre-existing from before this run, none in the 3870+ range used today) → coverage.mjs → build_gv_layer.mjs. Population coverage 75.79% → 77.02% (+1.23pp); municipalities claimed 6,738 → 6,815 (+77, more than the 60 seeded — bonus harvest as listed above).

Phase-2a pool remaining (freshly computed): 316 units / 3.71M people (next up: Bovenden 14,078, Vöhringen 14,044, Lübben (Spreewald) 14,028, Melsungen 13,994, Schmölln 13,953, Grafing b.München 13,942, Erbach/Kreisstadt (Odenwaldkreis, Hessen — distinct from this run's Erbach/Donau) 13,935, Dippoldiswalde 13,915, Eichstätt 13,891, Beelitz 13,879, Höchstadt a.d.Aisch 13,867, Wittstock/Dosse 13,804).

For next run: continue phase-2a from Bovenden down, same method — recompute the pool yourself via coverage.mjs + build_gv_layer.mjs before trusting this handoff, and when you do, filter gemeindeverband-queue.csv on members_total === 1, not members_residual === 1 — the latter silently admits partially-claimed multi-member units (see the Bietigheim-Bissingen false-positive above) and would misorder the whole batch by population if used unchecked. Next free company_id starts at wv-de-3942 (this run's shards used up to 3895 in p3a and 3941 in p3b; nothing above 3941 is taken, and any gaps below that from self-fixed dedupes are free to reuse). Keep the explicit "you may not use the Agent/Task tool" line and the "grep the full candidate company name" line verbatim in every subagent prompt — 11th consecutive clean batch, no recursion, and this run's near-miss (Homberg (Efze)) shows the self-check catching a real adjacent-shard collision when run more than once, not just at the end. resolve_singleton.mjs remains unfixed (TASKDIR/_tasks ENOENT) — still not blocking, unfixed across 8+ runs now; still worth a real fix as phase-2a's pool (now 316 units) gets closer to exhaustion and phase-2b will need it more.