diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 882894576..18a03f892 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,11 @@ on:
     - cron: "0 18 * * 0"
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  # Deliberate one-off runs (workflow_dispatch, weekly schedule) get a per-run group so a
+  # push to the same ref cannot cancel them mid-flight — release-browser-matrix takes up to
+  # 70 minutes and was repeatedly killed by main churn. Push/PR runs keep the shared ref
+  # group with cancel-in-progress so superseded heads still stop early.
+  group: ${{ github.workflow }}-${{ (github.event_name == 'workflow_dispatch' || github.event_name == 'schedule') && github.run_id || github.ref }}
   cancel-in-progress: true
 
 permissions:
diff --git a/docs/branch-review-ledger.md b/docs/branch-review-ledger.md
index 90be05431..95ebaac07 100644
--- a/docs/branch-review-ledger.md
+++ b/docs/branch-review-ledger.md
@@ -644,3 +644,4 @@ Use this ledger to prevent repeated branch and PR reviews when the reviewed HEAD
 | 2026-07-19 | cursor/mobile-header-new-chat-inset-66c0 (PR #940) | 84eb0b6c3782e27fbbd1ec79b87b10327802ec1e | final mobile header new-chat edge inset review + merge readiness | No high-confidence P0-P1. Root cause: unlayered `@media (max-width:639px)` zeroed `.edge-glass-header` padding and beat `@layer components`. Fixed with tokenized `--header-edge-pad: 1rem` shared by layered base + unlayered phone guard; Playwright symmetry checks at 360/390; source contract blocks a `max(0px, safe-area)` regression. Merged latest `origin/main` (including #933/#942/#943) while keeping the header-edge-pad token. Residual: headless Chromium cannot exercise asymmetric safe-area `max()`; DocumentViewer gains the same pad but is outside the symmetry test. | Local geometry probe 360/390/640 = 16px/16px symmetric; CSS contract Vitest 5/5; `ui-overlap` Chromium 14/14; prior `verify:ui` 242/242 on the functional head; `verify:cheap` unit suite hit only the known container-only `pdf-extraction-budget` python ENOENT artifact (also fails on clean main / hosted-CI-green elsewhere). PR marked ready; squash auto-merge enabled. No OpenAI/live Supabase/provider calls. |
 | 2026-07-20 | origin/main PWA-surface review, window `ef042ca..e128384` (44+ commits; explicit user request) + phone install-sheet redesign (this branch, content commit d8d8c4a) | e1283846647b20cd49ca6ae6920a7c76f2b945d7 | PWA-version review of new progress + install-notification design elevation | Sweep verdict (agent-verified): only #905/#897 (this program's own work) touched PWA surfaces in the window — sw.js CACHE_VERSION `2026-07-18-v1` and its offline.html binding, manifest (7 icons incl. monochrome; screenshots deliberately absent), icons route, kill-switch, and next.config headers all unchanged, so the privacy contract holds by construction. Geometric risk from five composer/dock-space reworks (#933 mobile-composer-reserve, #932, #930, #922, #899) probed live at 390×844: the non-install notice stack keeps correct clearance at rest (offline card bottom 744/844 with the 5.5rem gutter) and the stack's offset is now a custom property (`--pwa-notice-bottom-gap`) for one-line re-anchoring if composer geometry moves again. Redesign: install prompt + iOS hint present as a native bottom sheet on phones (full-bleed, flush bottom, grip bar matching #935's sheet language, real app icon identity via /icons/icon-192, Free/no-store meta row, two accent step chips for Share→Add to Home Screen as aria-hidden reinforcement of the unchanged accessible sentence); ≥640px keeps the #905 card/toast placements; region names, button names, and test-locked sentences unchanged. | Focused vitest 56/56 across the four PWA suites; `verify:cheap` 2971/2975 (sole fail = known container-only pdf-extraction-budget artifact); `test:e2e:pwa` privacy/offline green (installability fail = known container `in-incognito` artifact); `verify:ui` 243 passed/2 failed (the two long-baselined container artifacts); production build + client-bundle secret scan + bundle budget within tolerance (1303.4 vs 1278.6 KiB baseline; sheet adds ~0 JS); visual evidence at 390 light/dark/iOS-hint + 768 + 1440 with bounding-box math (full-bleed flush-bottom on phone; card/toast intact above). No provider-backed checks run. |
 | 2026-07-20 | Credentialed release-gate checkpoint closeout (workflow_dispatch on main `7ec25d9`; user-authorized ≤$10, single dispatch each) | 7ec25d9675dea13635fa4a895af88c93da694a42 | Credentialed half of the release gate: CI dispatch + live eval canary | CI dispatch: 9/10 jobs green (unit coverage, build, Chromium production journeys, migration replay on local Supabase emulator, production-readiness CI-safe, policy self-tests, static/safety/scope). `release-browser-matrix` (WebKit/Firefox) CANCELLED twice by main-churn: ci.yml `concurrency: CI-${ref}, cancel-in-progress: true` kills in-flight dispatch runs on every main push and this repo merges every few minutes — livelock confirmed at the 2-attempt cap; WebKit/iOS verification remains outstanding with three human options (quiet-window dispatch, the weekly scheduled run, or a one-line dedicated concurrency group for the matrix job — operational-risk change, not applied). Eval canary: golden retrieval eval FAILED 4/36 (document_recall@5 0.944, ndcg@10 0.923, force_embedding_failure_count 0, no 429s — vector layer healthy, NOT the documented vector-ptsd transient class); the July 17 dispatch PASSED this step pre-#901, so the regression window implicates #901's deterministic semantic reranking (lithium-therapy-monitoring shows three unrelated documents with byte-identical rerank scores burying the lithium guideline; two other failures add fixture-vs-corpus identity components; answer-quality subset — the July 17 failure — never ran). NO canary re-run per plan (deterministic, not transient); retrieval is clinical-path and deferred to a human decision. Provider spend ≈ $1–2 (one canary run's embeddings); matrix/CI runs $0. | actions_run_trigger dispatches + rerun_failed_jobs (attempt 2); job-level conclusions and log excerpts from runs 29675875530 (both attempts), 29675878737 (July 19 canary), and 29567502452 (July 17 baseline). No local provider calls; secrets never left GitHub Actions. |
+| 2026-07-20 | claude/clinical-kb-pwa-review-asi3wb (restarted; PR: ci.yml concurrency) | 79aaacf04e64f753c480dd957a81ac9be6acbb43 | CI workflow concurrency: stop main churn cancelling dispatch/schedule runs | One-line group expression: workflow_dispatch/schedule events now get a per-run concurrency group (github.run_id) while push/PR keep the shared ref group with cancel-in-progress — fixes the release-browser-matrix livelock (cancelled twice on 2026-07-19/20 by main merges mid-run; the weekly Sunday 18:00 UTC scheduled run was subject to the same cancellation). release-browser-matrix is not a required branch-protection check; pin/scope checkers do not constrain the concurrency block. Accepted side effect: deliberate runs can overlap push runs. Rollback: plain revert. | check:github-actions PASS; check:ci-scope PASS; format:check PASS (repo files; local-only .claude/settings.local.json warning is gitignored) |