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+# Lane 1 — Google Ads conversion placeholder tag re-verification (2026-08-15)
+
+Item: `d2c8a852ff` — "[unreviewed-by-opus] The funnel's only Google Ads
+conversion measurement is dead by construction: placeholder tag"
+
+Branch: `fix/ads-conversion-placeholder-rereverify-2026-08-15-lane1`
+Base: `origin/main` at `c62211c` (2026-08-15)
+
+## Verdict
+
+**Finding stays closed — no code change required.** The dead-by-construction
+Google Ads conversion tag was removed by PR #172 (`60d045c`, merged
+2026-08-13): the worker now generates the tag at request time from
+`GOOGLE_ADS_CONVERSION_ID` / `GOOGLE_ADS_CONVERSION_LABEL`, emits it only on
+`/brief-requested` when both are configured and well-formed, and emits
+nothing otherwise. The CI guard in `scripts/check-site.mjs` makes the
+placeholder shape impossible to return. The fix remains intact on both
+current main (`c62211c`) and the live deployment.
+
+## Changes since the 2026-08-15 #227/#228 re-verification (base 23e24d6)
+
+No commits since `23e24d6` (#227/#228) touched the ads-conversion surface:
+the diff range `23e24d6..HEAD` is empty for `src/worker.js`,
+`public/brief-requested.html`, `public/brief-requested.js`,
+`scripts/check-site.mjs` and `specs/003-wellness-clinic-launch/tracking-setup.md`.
+
+## Source verification (head c62211c)
+
+- `git merge-base --is-ancestor 60d045c HEAD` → yes.
+- `src/worker.js` lines 1350-1383: `googleAdsConversion()` returns `null`
+  unless both env values are present and match `/^AW-\d{6,15}$/` and
+  `/^[A-Za-z0-9_-]{10,50}$/`; injection confined to `/brief-requested`
+  and `/brief-requested.js`.
+- `public/brief-requested.html` / `public/brief-requested.js`: no loader,
+  no placeholder — only the explanatory comment; the script is a static
+  no-op the worker replaces when configured.
+- `npm run check` passes (including the Google Ads guard section).
+- `npm test` passes end to end: check-site, headings 6/6, sitemap 7/7,
+  worker 80/80 (incl. the three ads-tag tests), agent-UI 16/16,
+  product-contract 8/8, first-viewport 4/4, narrow-viewport — zero
+  failures across all suites.
+
+## Live verification (2026-08-15)
+
+- `GET https://tinystudio.io/brief-requested.html` → 307 →
+  `/brief-requested` → 200, strict CSP, zero `googletagmanager` / `AW-`
+  references (single "gtag" hit is the explanatory comment).
+- `GET https://tinystudio.io/brief-requested.js` → 200, static no-op, no
+  `gtag(` / `dataLayer`.
+
+With the secrets unset, the funnel ships zero tracking rather than a dead
+tag — exactly the designed behavior — and the tag activates from env with
+no code change the moment the real conversion ID and label are set via
+`wrangler secret put`.
+
+## Outcome
+
+Closed, no code change. Full evidence:
+`docs/evidence/ads-conversion-placeholder-rereverify-2026-08-15-lane1.md`.
diff --git a/docs/evidence/ads-conversion-placeholder-rereverify-2026-08-15-lane1.md b/docs/evidence/ads-conversion-placeholder-rereverify-2026-08-15-lane1.md
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+# Google Ads conversion placeholder tag — re-verification 2026-08-15 (lane 1)
+
+Item: `d2c8a852ff` — "[unreviewed-by-opus] The funnel's only Google Ads
+conversion measurement is dead by construction: placeholder tag"
+
+## Verdict
+
+**Already fixed on main and live — re-verified, stays closed. No code change
+was needed.** The dead-by-construction shape was removed by PR #172
+(`60d045c`, merged 2026-08-13); the close-out has been recorded by #215
+(`0e483ca`, 2026-08-14), #216 (`76ee0e7`, 2026-08-15) and #227/#228
+(`23e24d6`, 2026-08-15). This lane (1) re-verified the fix against the
+current `origin/main` head (`c62211c`) and the live deployment on
+2026-08-15.
+
+## What was dead (pre-#172)
+
+- `public/brief-requested.html` hardcoded the gtag loader with placeholder
+  `AW-XXXXXXXXX` (from the page's first commit `c90c8a4` / PR #14).
+- `public/brief-requested.js` fired the conversion event to the same
+  placeholder (`AW-XXXXXXXXX/YYYYYYYYYYYYYYYYYYY`).
+- The production CSP (`script-src 'self'
+  https://static.cloudflareinsights.com`) blocked `googletagmanager.com`
+  entirely, so even a real id pasted in could never load or record.
+
+## The merged fix (PR #172, `60d045c`)
+
+- The conversion tag is generated by the worker at request time from
+  `GOOGLE_ADS_CONVERSION_ID` / `GOOGLE_ADS_CONVERSION_LABEL`, emitted only
+  on `/brief-requested` when both are configured and well-formed
+  (`GOOGLE_ADS_ID_PATTERN` `/^AW-\d{6,15}$/`, `GOOGLE_ADS_LABEL_PATTERN`
+  `/^[A-Za-z0-9_-]{10,50}$/` — strict patterns, safe to interpolate).
+- With either value missing or malformed, the page ships with **no tag at
+  all** — a dead tag is never served.
+- gtag's CSP allowances (`GOOGLE_ADS_CSP`) are scoped to that one noindex
+  page's response; every other page keeps the strict CSP.
+- `public/brief-requested.js` is a documented static no-op; the worker
+  serves the generated conversion script in its place when configured.
+- CI (`scripts/check-site.mjs` "Google Ads conversion tag" guard) refuses
+  any placeholder or hardcoded gtag in `public/` or `src/worker.js`, and
+  requires the env-driven wiring to stay wired — the dead-by-construction
+  shape cannot return.
+- `specs/003-wellness-clinic-launch/tracking-setup.md` documents the
+  `wrangler secret put` steps that activate the tag once the console-side
+  conversion action exists.
+
+## Source checks on the current head (c62211c)
+
+1. `git merge-base --is-ancestor 60d045c HEAD` → yes, the fix commit is in
+   the current head. No commit since the #227/#228 close-out
+   (`23e24d6`, 2026-08-15) touched `src/worker.js`,
+   `public/brief-requested.html`, `public/brief-requested.js`,
+   `scripts/check-site.mjs` or `specs/003-wellness-clinic-launch/tracking-setup.md`
+   (empty diff range `23e24d6..HEAD` for those files).
+2. `src/worker.js` lines 1350-1383: `googleAdsConversion()` returns `null`
+   (emits nothing) unless both env values are present and well-formed; the
+   loader/script injection is confined to `/brief-requested` and
+   `/brief-requested.js`.
+3. `public/brief-requested.html` carries only the explanatory comment that
+   the worker injects the tag; no loader, no placeholder.
+4. `public/brief-requested.js` is a documented static no-op (8 lines).
+5. `npm run check` passes — including the "Google Ads conversion tag" guard
+   section (placeholder scan, no hardcoded gtag in public files, worker
+   wiring present).
+6. `npm test` passes end to end on this head: check-site, headings 6/6,
+   sitemap 7/7, worker 80/80 (including the three ads-tag tests: no tag +
+   strict CSP while unconfigured; injected loader + generated script +
+   page-scoped CSP when configured; nothing emitted for partial or
+   malformed config), agent-UI 16/16, product-contract 8/8, first-viewport
+   4/4, narrow-viewport — zero failures across all suites.
+
+## Live re-verification 2026-08-15
+
+Plain-fetch probes against the live `https://tinystudio.io` (current
+deployment of current main):
+
+```
+GET https://tinystudio.io/brief-requested.html → HTTP 307 → /brief-requested
+GET https://tinystudio.io/brief-requested     → HTTP/2 200
+  content-security-policy: default-src 'self'; img-src 'self' data:;
+    style-src 'self' https://fonts.googleapis.com; font-src 'self'
+    https://fonts.gstatic.com; script-src 'self'
+    https://static.cloudflareinsights.com; connect-src 'self'
+    https://cloudflareinsights.com; base-uri 'self'; frame-ancestors
+    'none'; form-action 'self'
+  body: zero googletagmanager / AW- references; the single "gtag" hit is
+  the explanatory HTML comment (line 18) — no loader, no event
+GET https://tinystudio.io/brief-requested.js → 200, static no-op, no
+  gtag( / dataLayer
+```
+
+The served `/brief-requested` contains no loader and no conversion event,
+and carries the strict CSP — the page-scoped `GOOGLE_ADS_CSP` is not
+applied because the env values are unconfigured, so no tag is emitted.
+This is exactly the designed behavior: with the secrets unset, the funnel
+ships zero tracking rather than a dead tag, and the tag activates the
+moment the real conversion id/label are set via `wrangler secret put`
+(per `specs/003-wellness-clinic-launch/tracking-setup.md` §3) — without
+any code change.
+
+## Repro steps
+
+1. Source guard: `npm run check` — the "Google Ads conversion tag" section
+   fails if any placeholder or hardcoded gtag reappears in `public/` or
+   `src/worker.js`, or if the env-driven wiring is removed.
+2. Worker behavior: `node --test scripts/test-agent-worker.mjs` — the ads
+   tests cover unconfigured / configured / partial-malformed config.
+3. Live probe:
+   `curl -s https://tinystudio.io/brief-requested | grep -c googletagmanager`
+   → 0, and the response carries the strict CSP (no `googleadservices` /
+   `googletagmanager` allowances) while the secrets are unset.
+
+## Close-out
+
+The item as stated — "The funnel's only Google Ads conversion measurement
+is dead by construction: placeholder tag" — is **closed against current
+main and live**: the dead-by-construction shape was removed by PR #172
+(`60d045c`), the CI guards in `scripts/check-site.mjs` make the placeholder
+shape impossible to return, `npm run check` and `npm test` pass on the
+current head (`c62211c`, zero failures), and the live site serves
+`/brief-requested` with no tag, the static no-op script, and the strict
+CSP while the env values are unconfigured — nothing dead is shipped, and
+the tag activates from env with no code change the moment the real
+conversion ID and label are set.