diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cef95b96..ebe24d15e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [1.91.99.0] - 2026-10-13
+
+**A Bun pin mismatch on Capy now names the one command that fixes it, and the skill says to run it.** After gbrain pinned Bun 1.4.3 in CI, a session-start check on a gbrain checkout ended `gstack: fail pins` with a fix line that offered two choices and no command, and the skill's repair step only covered `revision` and `runtime`, so an agent following the skill left the machine failing. The same bootstrapper run without `--check` already installs the pinned Bun (a verified 1.4.3 in about 4 s) and ends `gstack: ok`.
+
+### What this means for you
+
+- **The `pins` row's fix is the exact command on Capy.** Under the Drive bootstrapper, `FAIL pins … (PROJECT_PIN_MISMATCH)` now says `fix: bash <skill>/scripts/install.sh [--for <skill>] (installs the project's pinned Bun when it is a verified version: 1.4.2 1.4.3; otherwise it names the conflict), or change the pin in <project>`. Outside Capy the fix text is unchanged.
+- **The Capy skill's repair step covers `pins`.** Step 2 runs the same command without `--check` when the trailer names `revision`, `runtime` or `pins`. A pin gstack has no verified archive for stops with `RUNTIME_PIN_CONFLICT` naming the pin to raise. The owner copies `capy/skill/gstack/` to the Drive skill folder as before; `scripts/install.sh` is unchanged.
+
+### For contributors
+
+- `test/gstack-doctor.test.ts` checks the Capy fix line (with and without `--for`) and that the non-Capy text does not name the wrapper; it fails before the change.
+
 ## [1.91.98.0] - 2026-10-13
 
 **A lane's plan obligations now meet the repo's own gates before it reports done. Paid gates get a price before approval, a restamp is proved stamp-only by machine, and sealed eval output can't ride a push into a public repo.**
@@ -20,6 +33,7 @@
 - New: `lib/pregate/checks/guards.ts`, `lib/pregate/regate.ts`, `lib/pregate/runtime.ts`, `lib/sealed-guard.ts`; docs `docs/eval-calls.md`, `docs/pregate.md#regate` and `#gbrain-worked-configs`.
 - New result codes with troubleshooting anchors include `EVAL_GATE_UNPRICED`, `PREGATE_GUARD_FAILED`, `SEALED_OUTPUT_REFUSED` and `MIGRATION_COLLISION`.
 - Pregate and ship-policy validators still refuse unknown keys, so a repo should commit `guards`, `sealed`, `price_file`, `stamp_files`, `stamp_patterns`, `restamp_command` or `migrations` only after its machines run this release.
+
 ## [1.91.97.0] - 2026-10-13
 
 **An unattended `/autoplan` run on Capy now closes in its own run directory. Reviews done by Capy subagents bind with one command, a revised plan is reviewed in the same run, and the gate asks fewer, better questions.**
diff --git a/VERSION b/VERSION
index 0a3f874a1..c2ce38c56 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.91.98.0
+1.91.99.0
diff --git a/agents-digest/gstack-AGENTS.md b/agents-digest/gstack-AGENTS.md
index 6f0e18552..1d59dbb9e 100644
--- a/agents-digest/gstack-AGENTS.md
+++ b/agents-digest/gstack-AGENTS.md
@@ -1,4 +1,4 @@
-# gstack digest v1.91.98.0 — regenerate/re-copy after upgrading gstack
+# gstack digest v1.91.99.0 — regenerate/re-copy after upgrading gstack
 
 Behavioral rules from gstack (https://github.com/garrytan/gstack), compressed
 for agent hosts without a full skill install. The full skills add workflows,
diff --git a/bin/gstack-doctor-check.sh b/bin/gstack-doctor-check.sh
index 617946137..b028323b8 100644
--- a/bin/gstack-doctor-check.sh
+++ b/bin/gstack-doctor-check.sh
@@ -297,6 +297,7 @@ _dc_check_pins() {
             return
           fi
           local fix="install the pinned version for this platform (bin/gstack-capy-install installs gstack's verified Bun alongside when a pin names it), or change the pin in $project" note=""
+          [ -n "${GSTACK_CAPY_WRAPPER_PATH:-}" ] && fix="bash $GSTACK_CAPY_WRAPPER_PATH${CHECK_FOR:+ --for $CHECK_FOR} (installs the project's pinned Bun when it is a verified version: $GSTACK_BUN_VERIFIED; otherwise it names the conflict), or change the pin in $project"
           if [ -n "$_dc_ln_dir" ] && [ "$_dc_ln_ver" != "$_dc_bun" ] \
              && bun "$BIN/gstack-runtime-pins.ts" --project "$project" --bun "$_dc_ln_ver" ${node:+--node "$node"} </dev/null 2>/dev/null | grep -q '^PINS_VERDICT: pass'; then
             note="; bun $_dc_ln_ver found at $_dc_ln_dir (not on PATH) satisfies them" fix="$_dc_ln_fix"
diff --git a/capy/skill/gstack/SKILL.md b/capy/skill/gstack/SKILL.md
index 55a13c4d5..397dba50c 100644
--- a/capy/skill/gstack/SKILL.md
+++ b/capy/skill/gstack/SKILL.md
@@ -10,7 +10,7 @@ description: Install and use gstack in Capy and Claude Code. Load at session sta
 Resolve `scripts/install.sh` relative to this SKILL.md, not the working repository. It is a frozen bootstrapper: it prints `gstack-capy-skill: wrapper <n> (<path>)` first, learns the supported minimum from gstack's remote, and hands over to the checkout's own wrapper (`bin/gstack-capy-session`).
 
 1. At session start run `bash scripts/install.sh --check`, adding `--for <skill>` when you know the workflow (`--for autoplan`, `--for review`, `--for qa`). It prints one `PASS|FAIL|SKIP <component>` row per component, a `GSTACK_LAUNCH:` line, and exactly one trailer as the last line: `gstack: ok <revision> for=<skill>` (exit 0) or `gstack: fail <ids> …` (exit 1). Read the exit status and grep `^gstack: ` directly; never pipe the check through `tail`, `head` or `grep` alone. `--check` never moves the checkout.
-2. If the trailer is `gstack: fail revision …` or `gstack: fail runtime …` and a checkout exists, run the same command without `--check` (900-second timeout). A clean, unpinned checkout below the supported minimum is fast-forwarded (`gstack-capy-skill: upgraded <old> -> <new>`), reinstalled and rechecked in one locked step; about 1 s when nothing changed. A pinned (`--revision`, detached), dirty or diverged checkout is never moved: the trailer names the cause and the exact commands. `GSTACK_CAPY_AUTO_UPGRADE=0` disables the fast-forward.
+2. If the trailer names `revision`, `runtime` or `pins` (`gstack: fail revision …`, `gstack: fail runtime,pins`, `gstack: fail pins`) and a checkout exists, run the same command without `--check` (900-second timeout). For `pins` it installs the project's pinned Bun when the pin names a verified version (about 4 s), or stops with `RUNTIME_PIN_CONFLICT` naming the pin to raise. A clean, unpinned checkout below the supported minimum is fast-forwarded (`gstack-capy-skill: upgraded <old> -> <new>`), reinstalled and rechecked in one locked step; about 1 s when nothing changed. A pinned (`--revision`, detached), dirty or diverged checkout is never moved: the trailer names the cause and the exact commands. `GSTACK_CAPY_AUTO_UPGRADE=0` disables the fast-forward.
 3. If the trailer is `gstack: fail not-installed …` and this session runs no gstack workflow, record that line and continue; nothing is installed. Install right before the first workflow with `bash scripts/install.sh --for <skill>` (about 30 s cold: clone, the SHA-256-verified Bun 1.4.2, both host profiles without Chromium).
 4. Any other `FAIL` row carries a `fix:` command and a reason code with a troubleshooting anchor; run the fix, then `--check` again. `SKIP codex-cli (optional; …)`, `SKIP browser (lazy; …)` and `SKIP pins (planning-only; …)` are not failures.
 
diff --git a/docs/troubleshooting.md b/docs/troubleshooting.md
index fe26c07f3..fc1e2c026 100644
--- a/docs/troubleshooting.md
+++ b/docs/troubleshooting.md
@@ -1117,7 +1117,11 @@ fails. The row is `SKIP pins (no bun to evaluate the project pins)` when Bun
 is absent, never silent.
 
 **Fix.** Install the pinned version for this platform (the row names each
-constraint with its source), or change the project's pin.
+constraint with its source), or change the project's pin. On Capy the row's
+fix is the exact bootstrapper command, `bash <skill>/scripts/install.sh`
+(the same command without `--check`): it installs the pinned Bun when the pin
+names a verified version and ends `gstack: ok`, or stops with
+`RUNTIME_PIN_CONFLICT` naming the pin to raise.
 
 <a id="doctor-revision-unmet"></a>
 ### `FAIL revision — installed <version> (requested <ref>) (REVISION_UNMET; ...)`
diff --git a/lib/result-codes.ts b/lib/result-codes.ts
index 16bcf8001..4e7f5d0ea 100644
--- a/lib/result-codes.ts
+++ b/lib/result-codes.ts
@@ -128,7 +128,7 @@ export const RESULT_CODES = {
   PROJECT_PIN_MISMATCH: {
     anchor: 'doctor-project-pin-mismatch',
     summary: 'the running Bun or Node is outside a version the target project pins (package.json engines, .tool-versions, .nvmrc, .bun-version or a CI workflow)',
-    fix: 'install the pinned version for this platform, or change the pin in the project',
+    fix: 'install the pinned version for this platform (on Capy: run the gstack skill\'s `scripts/install.sh` without --check), or change the pin in the project',
   },
   REVISION_UNMET: {
     anchor: 'doctor-revision-unmet',
diff --git a/package.json b/package.json
index 726b20b28..bd7e4804c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gstack",
-  "version": "1.91.98",
+  "version": "1.91.99",
   "description": "Garry's Stack — Claude Code skills + fast headless browser. One repo, one install, entire AI engineering workflow.",
   "license": "MIT",
   "type": "module",
diff --git a/test/gstack-doctor.test.ts b/test/gstack-doctor.test.ts
index 6abfdacb3..fa1528c09 100644
--- a/test/gstack-doctor.test.ts
+++ b/test/gstack-doctor.test.ts
@@ -606,6 +606,22 @@ describe('gstack-doctor --check', () => {
     expect(missing.rows.pins.status).toBe('SKIP');
   });
 
+  test('project pins on Capy: the PROJECT_PIN_MISMATCH fix is the exact bootstrapper command, which installs a verified pinned Bun', () => {
+    const f = makeFixture();
+    const project = path.join(f.base, 'project');
+    write(path.join(project, 'package.json'), '{\n  "engines": {\n    "bun": ">=1.4.2"\n  }\n}\n');
+    const wrapper = '/drive/skills/gstack/scripts/install.sh';
+    const capy = row(f, ['--project', project], { STUB_BUN_VERSION: '1.3.14', GSTACK_CAPY_WRAPPER_PATH: wrapper });
+    expect(capy.rows.pins.status).toBe('FAIL');
+    expect(capy.rows.pins.rest).toContain(`fix: bash ${wrapper} (installs the project's pinned Bun when it is a verified version: 1.4.2 1.4.3; otherwise it names the conflict), or change the pin in ${project}`);
+    expect(capy.rows.pins.rest).toContain('(PROJECT_PIN_MISMATCH; ');
+    const forSkill = row(f, ['--project', project, '--for', 'review'], { STUB_BUN_VERSION: '1.3.14', GSTACK_CAPY_WRAPPER_PATH: wrapper });
+    expect(forSkill.rows.pins.rest).toContain(`fix: bash ${wrapper} --for review (installs`);
+    const plain = row(f, ['--project', project], { STUB_BUN_VERSION: '1.3.14' });
+    expect(plain.rows.pins.rest).toContain('fix: install the pinned version for this platform');
+    expect(plain.rows.pins.rest).not.toContain(wrapper);
+  });
+
   test('--revision: a matching VERSION passes, an unmet revision is never ok', () => {
     const f = makeFixture();
     const ok = row(f, ['--revision', VERSION]);