docs: update project documentation for v1.72.0.0

docs/skills.md: Third-Party Web Actions subsection under /ship (Aside
recommended driver, consent rules, credential boundaries). BROWSER.md:
"Aside and third-party drives" subsection under Real-browser mode + ToC
entry, including the no-gstack-side-audit-trail caveat (ship adversarial
finding 12). TODOS.md: mark the finding-12 doc note done.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

BROWSER.md

@@ -49,7 +49,7 @@ $B connect                       # headed Chromium + Side Panel extension
 5. [Snapshot system + ref-based selection](#snapshot-system)
 6. [Browser-skills runtime](#browser-skills-runtime)
 7. [Domain-skills (per-site agent notes)](#domain-skills)
-8. [Real-browser mode (`$B connect`)](#real-browser-mode) — including [`--headed` + `--proxy` + `--navigate` (v1.28.0.0)](#headed-mode--proxy--browser-native-downloads-v12800)
+8. [Real-browser mode (`$B connect`)](#real-browser-mode) — including [`--headed` + `--proxy` + `--navigate` (v1.28.0.0)](#headed-mode--proxy--browser-native-downloads-v12800) and [Aside and third-party drives (v1.72.0.0)](#aside-and-third-party-drives-v17200)
 9. [Side Panel + sidebar agent](#side-panel--sidebar-agent)
 10. [Pair-agent — remote agents over an ngrok tunnel](#pair-agent)
 11. [Authentication + tokens](#authentication)
@@ -569,6 +569,21 @@ with your tabs and bookmarks stays untouched.
 - **Demos** where you're sharing your screen
 - **Pair-agent** sessions (the remote agent drives your local browser)
 
+### Aside and third-party drives (v1.72.0.0+)
+
+For third-party website moments (registering an API key, configuring a vendor
+dashboard), the workflow skills (`/ship`, `/spec`, `/office-hours`,
+`/land-and-deploy`, `/setup-deploy`) recommend the Aside AI browser when it's
+installed — it acts across your real logged-in sessions — with `$B` headed
+mode + handoff as the universal fallback. Consent is per-task and explicit;
+gstack never installs Aside for you, and a detected binary is never treated
+as consent.
+
+One observability caveat: drives through Aside happen entirely inside Aside,
+so they leave no gstack-side audit trail — no egress receipts, no
+browse-daemon logs. The audit trail for those drives lives in Aside itself.
+Drives through `$B` keep the normal daemon logs and egress receipts.
+
 ### CDP-aware skills
 
 When in real-browser mode, `/qa` and `/design-review` automatically skip

TODOS.md

@@ -471,9 +471,10 @@ directory path got.
 
 **Why:** The symlink-swap class fixed for directories on this branch remains
 open for the files inside them (ship adversarial review, finding 5).
-Also note for docs: drives through Aside leave no gstack-side audit trail
-(no egress receipts, no browse-daemon logs) — the audit trail lives in Aside;
-worth a line in BROWSER.md when this area is next touched (finding 12).
+Docs note (finding 12) — done in the v1.72.0.0 doc pass: BROWSER.md
+§ "Aside and third-party drives" now records that Aside drives leave no
+gstack-side audit trail (no egress receipts, no browse-daemon logs); the
+audit trail lives in Aside.
 
 **Effort:** S (human ~half day / CC+gstack ~20 min)
 **Priority:** P3

docs/skills.md

@@ -659,6 +659,12 @@ Every `/ship` run builds a code path map from your diff, searches for correspond
 
 `/ship` checks the [Review Readiness Dashboard](#review-readiness-dashboard) before creating the PR. If the Eng Review is missing, it asks — but won't block you. Decisions are saved per-branch so you're never re-asked.
 
+### Third-party web actions (v1.72.0.0+)
+
+Sometimes the release work leaves the terminal: registering an API key, creating a vendor account, wiring a webhook or OAuth app. Instead of handing you a manual step list, `/ship` (and `/spec`, `/office-hours`, `/land-and-deploy`, `/setup-deploy`) offers to drive the browser for you. The recommended driver is the Aside AI browser when it's installed — it acts across your real logged-in sessions, which is exactly what vendor dashboards need. gstack's own visible browser (`$B` headed mode with handoff for sign-in) is the fallback on every platform.
+
+The consent rules are strict and pin-tested: one explicit question per task naming the exact site and actions, no standing permission, no auto-install ever (on a Mac without Aside you get one download pointer — aside.com, macOS 15+ — once per task). Passwords, payment, CAPTCHAs, and identity verification stay yours; Apple credential creation is never a drive target in any skill. A captured secret never appears in chat — it lands in an owner-only file and gets verified with one read-only API call before gstack claims success.
+
 A lot of branches die when the interesting work is done and only the boring release work is left. Humans procrastinate that part. AI should not.
 
 ---