de:wasserversorger-discover

Journal entry appended. Final report for the notification channel:

Phase-2a batch 7 complete: researched and verified 60 more German municipalities' water suppliers (Rudolstadt-bound queue, Strausberg→Meckenheim), all 60 resolved with 49 new companies minted. Population coverage rose 63.57%→65.44% (+1.87pp), municipalities claimed 6,102→6,162. The two synchronous-subagent + explicit no-delegation instruction pattern from last run's fix held cleanly (no runaway background agents); the mandatory post-merge collision check caught and fixed 2 duplicate company mintings (Schleswiger Stadtwerke, WAV Rathenow) before they reached the roster. 822 singleton units (12.62M people) remain in the phase-2a pool for the next run; resolve_singleton.mjs's pre-pass is currently broken in this environment (missing _tasks dependency) and was skipped, flagged in the journal for a fix.

Continued phase-2a from the 13:00 run's exact handoff (verified pool: 882 units / 14.18M people, next-up list matched exactly — Strausberg down to Meckenheim). Took the next 60 singleton units by residual_population descending, 27,719 (Strausberg) down to 24,925 (Meckenheim). Split 2 SYNCHRONOUS subagents (p2l / p2m, 30 cities each), each launched with run_in_background: false and, critically, the explicit line from the last run's fix: "You may not use the Agent tool or the Task tool for any reason in this task... do not end your turn until your output files exist on disk with every assigned item accounted for." Both agents finished cleanly on the first try — no delegation, no background children, no "I'll wait" — confirming last run's fix holds. Non- overlapping company_id ranges (3335-3384 / 3385-3434).

resolve_singleton.mjs is currently broken in this environment: it hard-depends on TASKDIR = 5 levels up from the script (lib.mjs's path.resolve(HERE, '../../../../../_tasks/netzbetreiber-contact/german-water'), resolving to /_tasks/...), and that directory does not exist anywhere on this filesystem (checked /, /app, /app/countries/de — no _tasks dir, no gemeinden_deutschland.csv). Skipped the pre-pass entirely (it's documented as optional, "for site resolution only") and had both subagents research directly via WebSearch/WebFetch per the skill's "Per municipality" method — worked fine, just costs more fetches per city than the pre-pass would have saved. Worth fixing or removing: either the _tasks directory needs to be provisioned in this environment, or lib.mjs's TASKDIR path needs to become independent of it (the file it reads, gemeinden_deutschland.csv, looks redundant with GV100AD_30062026.txt/ags-city-map.csv already in this campaign dir). Flagging for whoever next touches resolve_singleton.mjs rather than fixing blind — didn't want to guess at a replacement data source.

All 60 resolved, 0 unresolved. 49 new companies minted (wv-de-3335-3360 in p2l less none retired; wv-de-3385-3409 in p2m less 2 retired — see below), several reused. Two duplicate company_ids caught by the mandatory post-merge collision check (run across roster.jsonl + both new shards, as the skill requires): p2m independently re-researched and re-minted Schleswiger Stadtwerke GmbH (wv-de-3399, for Schleswig city itself) and Wasser- und Abwasserverband Rathenow (wv-de-3405, for Rathenow city itself) — both companies already existed in the base roster (wv-de-1138, wv-de-1512) from earlier Amt-level batches that had linked some of their other members but not yet the namesake city. The subagent's own grep-before-minting check missed both, likely because it searched for domain/name fragments that didn't happen to match its search terms. Fixed by hand: dropped the two duplicate roster rows, repointed the two link rows (Schleswig → wv-de-1138, Rathenow → wv-de-1512) — both are legitimate new links (the city itself wasn't previously linked to either company), just needed the existing id. Pattern worth naming: the grep-before-minting instruction in the subagent prompt catches obvious regional-utility reuse (GELSENWASSER, Hessenwasser, etc.) but not "this Amt-level company already exists from a prior batch and I'm now resolving its literal namesake city" — worth a sharper instruction next time: grep for the municipality's own name, not just the candidate company's name, before minting.

Ran the Finish sequence: map_roster.mjs (6,721 links, 0 ambiguous/unmatched) → consolidate_roster.mjs (945 distinct companies, up from 896; 6 shard-level duplicates resolved by last-shard-wins, all pre-existing, none from this run's own shards after the manual fix) → coverage.mjs → build_gv_layer.mjs. Population coverage 63.57% → 65.44% (+1.87pp); municipalities claimed 6,102 → 6,162 (+60, confirming no double- or under-claims). Domain-collision check across the final merged roster.jsonl: back to the same 1 known pre-existing hit (emkendorf.de, unchanged since 2026-08-19) — confirmed clean, nothing new from this batch.

Trap patterns re-confirmed, same shapes as recent batches: energy-only "Stadtwerke" ≠ water supplier (Delitzsch→DERAWA not Stadtwerke Delitzsch; Harsewinkel→Wasserwerk der Stadt not Stadtwerke Harsewinkel GmbH; Warstein→Stadtwerke Warstein not the energy-only WVG; Wiehl→AggerEnergie not Aggerverband which is wholesale-only); wholesale-vs-retail splits at the Impressum level (Butzbach retail EVB/wholesale OVAG; Meckenheim retail Stadtwerke/wholesale Wahnbachtalsperrenverband; Sangerhausen retail/Fernwasser Elbaue-Ostharz wholesale; Syke and Helmstedt both retail with Harzwasserwerke wholesale upstream). Two municipalities split across two suppliers by district: Verden (Aller) — Stadtwerke Verden for the city centre, Trinkwasserverband Verden for Ortsteil Scharnhorst; Vaterstetten — gKU VE|MO for most of the municipality, Wasserverband Baldham for the Baldham district only. Both recorded as two separate link rows, consistent with the "overlap is real" hard rule.

Phase-2a pool remaining: 822 units / 12.62M people (next up: Rudolstadt 24,852, Bad Oldesloe 24,846, Schmallenberg 24,711, Eisenhüttenstadt 24,703, Olpe 24,695, Wandlitz 24,503, Starnberg 24,471, Plettenberg 24,429, Lennestadt 24,238, Herzogenaurach 24,237).

For next run: continue phase-2a from Rudolstadt down, same method. Next new-id range starts at wv-de-3410 (p2m's block ran 3385-3409 after the 2 retirements; p2l's ran 3335-3360 with slots 3361-3384 unused — either range is free, just don't reuse 3399/3405 which were minted then retired this run). Keep the explicit "you may not use the Agent/Task tool" line verbatim in every subagent prompt — it held for a 4th consecutive batch now. Keep grepping the existing roster before minting, but grep the municipality name too, not just the candidate company name, to catch the Schleswig/Rathenow-shaped miss.