feat: dual greptile-history paths (per-project + global)

- Suppressions read from ~/.gstack/projects/{slug}/greptile-history.md
- Triage outcomes write to both per-project and global files
- greptile-triage.md: remote-slug derivation, dual-write instructions
- review/SKILL.md + ship/SKILL.md: updated save path references
- TODO: add smart default QA tier (P2, S)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TODO.md

@@ -107,6 +107,7 @@
   - [ ] Greptile training feedback loop — export suppression patterns to Greptile team for model improvement (P3, S)
   - [ ] E2E test cost tracking — track cumulative API spend, warn if over threshold (P3, S)
   - [ ] E2E model pinning — pin E2E tests to claude-sonnet-4-6 for cost efficiency, add retry:2 for flaky LLM (P2, XS)
+  - [ ] Smart default QA tier — after a few runs, check index.md for user's usual tier pick, skip the question (P2, S)
 
 ## Ideas & Notes
   - Browser is the nervous system — every skill should be able to see, interact with, and verify the web

review/SKILL.md

@@ -84,7 +84,7 @@ After outputting your own findings, if Greptile comments were classified in Step
 
 **Include a Greptile summary in your output header:** `+ N Greptile comments (X valid, Y fixed, Z FP)`
 
-1. **VALID & ACTIONABLE comments:** These are already included in your CRITICAL findings — they follow the same AskUserQuestion flow (A: Fix it now, B: Acknowledge, C: False positive). If the user chooses C (false positive), post a reply using the appropriate API from the triage doc and save the pattern to `~/.gstack/greptile-history.md` (type: fp).
+1. **VALID & ACTIONABLE comments:** These are already included in your CRITICAL findings — they follow the same AskUserQuestion flow (A: Fix it now, B: Acknowledge, C: False positive). If the user chooses C (false positive), post a reply using the appropriate API from the triage doc and save the pattern to both per-project and global greptile-history (see greptile-triage.md for write details).
 
 2. **FALSE POSITIVE comments:** Present each one via AskUserQuestion:
    - Show the Greptile comment: file:line (or [top-level]) + body summary + permalink URL
@@ -94,11 +94,11 @@ After outputting your own findings, if Greptile comments were classified in Step
      - B) Fix it anyway (if low-effort and harmless)
      - C) Ignore — don't reply, don't fix
 
-   If the user chooses A, post a reply using the appropriate API from the triage doc and save the pattern to `~/.gstack/greptile-history.md` (type: fp).
+   If the user chooses A, post a reply using the appropriate API from the triage doc and save the pattern to both per-project and global greptile-history (see greptile-triage.md for write details).
 
 3. **VALID BUT ALREADY FIXED comments:** Reply acknowledging the catch — no AskUserQuestion needed:
    - Post reply: `"Good catch — already fixed in <commit-sha>."`
-   - Save to `~/.gstack/greptile-history.md` (type: already-fixed)
+   - Save to both per-project and global greptile-history (see greptile-triage.md for write details)
 
 4. **SUPPRESSED comments:** Skip silently — these are known false positives from previous triage.
 

review/greptile-triage.md

@@ -32,7 +32,13 @@ The `position != null` filter on line-level comments automatically skips outdate
 
 ## Suppressions Check
 
-Read `~/.gstack/greptile-history.md` if it exists. Each line records a previous triage outcome:
+Derive the project-specific history path:
+```bash
+REMOTE_SLUG=$(browse/bin/remote-slug 2>/dev/null || ~/.claude/skills/gstack/browse/bin/remote-slug 2>/dev/null || basename "$(git rev-parse --show-toplevel 2>/dev/null || pwd)")
+PROJECT_HISTORY="$HOME/.gstack/projects/$REMOTE_SLUG/greptile-history.md"
+```
+
+Read `$PROJECT_HISTORY` if it exists (per-project suppressions). Each line records a previous triage outcome:
 
 ```
 <date> | <repo> | <type:fp|fix|already-fixed> | <file-pattern> | <category>
@@ -89,12 +95,18 @@ gh api repos/$REPO/issues/$PR_NUMBER/comments \
 
 ## History File Writes
 
-Before writing, ensure the directory exists:
+Before writing, ensure both directories exist:
 ```bash
+REMOTE_SLUG=$(browse/bin/remote-slug 2>/dev/null || ~/.claude/skills/gstack/browse/bin/remote-slug 2>/dev/null || basename "$(git rev-parse --show-toplevel 2>/dev/null || pwd)")
+mkdir -p "$HOME/.gstack/projects/$REMOTE_SLUG"
 mkdir -p ~/.gstack
 ```
 
-Append one line per triage outcome to `~/.gstack/greptile-history.md`:
+Append one line per triage outcome to **both** files (per-project for suppressions, global for retro):
+- `~/.gstack/projects/$REMOTE_SLUG/greptile-history.md` (per-project)
+- `~/.gstack/greptile-history.md` (global aggregate)
+
+Format:
 ```
 <YYYY-MM-DD> | <owner/repo> | <type> | <file-pattern> | <category>
 ```

ship/SKILL.md

@@ -188,12 +188,12 @@ For each classified comment:
 - The comment (file:line or [top-level] + body summary + permalink URL)
 - Your recommended fix
 - Options: A) Fix now (recommended), B) Acknowledge and ship anyway, C) It's a false positive
-- If user chooses A: apply the fix, commit the fixed files (`git add <fixed-files> && git commit -m "fix: address Greptile review — <brief description>"`), reply to the comment (`"Fixed in <commit-sha>."`), and save to `~/.gstack/greptile-history.md` (type: fix).
-- If user chooses C: reply explaining the false positive, save to history (type: fp).
+- If user chooses A: apply the fix, commit the fixed files (`git add <fixed-files> && git commit -m "fix: address Greptile review — <brief description>"`), reply to the comment (`"Fixed in <commit-sha>."`), and save to both per-project and global greptile-history (see greptile-triage.md for write details, type: fix).
+- If user chooses C: reply explaining the false positive, save to both per-project and global greptile-history (type: fp).
 
 **VALID BUT ALREADY FIXED:** Reply acknowledging the catch — no AskUserQuestion needed:
 - Post reply: `"Good catch — already fixed in <commit-sha>."`
-- Save to `~/.gstack/greptile-history.md` (type: already-fixed)
+- Save to both per-project and global greptile-history (see greptile-triage.md for write details, type: already-fixed)
 
 **FALSE POSITIVE:** Use AskUserQuestion:
 - Show the comment and why you think it's wrong (file:line or [top-level] + body summary + permalink URL)
@@ -201,7 +201,7 @@ For each classified comment:
   - A) Reply to Greptile explaining the false positive (recommended if clearly wrong)
   - B) Fix it anyway (if trivial)
   - C) Ignore silently
-- If user chooses A: post reply using the appropriate API from the triage doc, save to history (type: fp)
+- If user chooses A: post reply using the appropriate API from the triage doc, save to both per-project and global greptile-history (type: fp)
 
 **SUPPRESSED:** Skip silently — these are known false positives from previous triage.