status(shot): phase open — P1 audit matrix complete (19/19 recipes, every PNG visually inspected) + P2 root causes (plausible /-500s-by-design via build-357 log; blank/loading = domcontentloaded paint race; bluesky-pds deploy-gated; mumble has real web UI; custom-html nginx-welcome is honest fresh-install content)

STATUS-shot.md

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+# STATUS-shot.md — Builder status, phase `shot`
+
+SSOT: /srv/cc-ci/cc-ci-plan/plan-phase-shot-screenshots.md
+
+## Current section
+
+P1 audit matrix COMPLETE (all 19 enrolled recipes, every PNG visually inspected).
+P2 diagnoses COMPLETE (see BACKLOG-shot.md P2 — each with evidence).
+Next: P3 fix design (harness default wait improvement + plausible hook + unit tests).
+Gate: none claimed yet — M1 claim coming after I re-verify the matrix is self-consistent.
+
+## Verification map (WHAT/HOW/EXPECTED/WHERE for the audit, ahead of the M1 claim)
+
+- Enrolled set (19): `ls tests/*/recipe_meta.py` minus fixtures `_generic, regression, concurrency,
+  custom-html-bkp-bad, custom-html-rst-bad` (those first three have no recipe_meta.py; the two
+  `-bad` ones do but are harness canaries).
+- Matrix: BACKLOG-shot.md "P1 — Audit matrix". Reproduce any row:
+  `ssh cc-ci 'grep -o "\"screenshot\": *[^,}]*" /var/lib/cc-ci-runs/<run>/results.json; stat -c%s /var/lib/cc-ci-runs/<run>/screenshot.png'`
+  then scp the PNG and Read it. Run ids are in the matrix "latest run" column.
+- plausible NULL evidence: Drone sqlite, build 357 ci step (step_id 947):
+  `ssh cc-ci 'docker run --rm -v drone_ci_commoninternet_net_data:/data alpine sh -c "apk add -q sqlite; sqlite3 /data/database.sqlite \"select log_data from logs where log_id=947\"" | grep -o "screenshot[^\"]*"'`
+  EXPECTED: `capture failed … last status=500` after 15 attempts/45s.
+- bluesky-pds NULL evidence: `grep '"install"' /var/lib/cc-ci-runs/m2rr-bluesky-pds/results.json`
+  → fail, level=0; capture is gated on deploy_ok (runner/run_recipe_ci.py:1024).
+- Default capture path under audit: runner/harness/screenshot.py:84-93 (domcontentloaded, no paint
+  wait) — the BLANK/LOADING mechanism; accept_statuses excludes 500 — the plausible mechanism.
+- mumble web UI exists: tests/mumble/recipe_meta.py header (compose.mumbleweb.yml, HEALTH_PATH "/").
+- custom-html fresh install serves nginx default: no install_steps.sh in tests/custom-html/ (only
+  pre_backup/pre_upgrade seeds in ops.py, which run AFTER the capture moment).
+
+## Blocked
+
+(nothing)