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investigate

Facilitates systematic debugging and root cause analysis through a structured four-phase approach for effective issue resolution.

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Security score

The investigate skill was audited on May 12, 2026 and we found 84 security issues across 4 threat categories. Review the findings below before installing.

Categories Tested

Security Issues

medium line 68

Template literal with variable interpolation in command context

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68```bash
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301```bash
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Template literal with variable interpolation in command context

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397```bash
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431echo "before relying on \`gbrain search\` for code questions in this worktree."
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559```bash
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878```bash
medium line 54

Access to hidden dotfiles in home directory

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54glob: "~/.gstack/projects/{repo_slug}/learnings.jsonl"
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Access to hidden dotfiles in home directory

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59glob: "~/.gstack/analytics/eureka.jsonl"
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Access to hidden dotfiles in home directory

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69_UPD=$(~/.claude/skills/gstack/bin/gstack-update-check 2>/dev/null || .claude/skills/gstack/bin/gstack-update-check 2>/dev/null || true)
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Access to hidden dotfiles in home directory

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71mkdir -p ~/.gstack/sessions
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Access to hidden dotfiles in home directory

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72touch ~/.gstack/sessions/"$PPID"
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Access to hidden dotfiles in home directory

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73_SESSIONS=$(find ~/.gstack/sessions -mmin -120 -type f 2>/dev/null | wc -l | tr -d ' ')
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Access to hidden dotfiles in home directory

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74find ~/.gstack/sessions -mmin +120 -type f -exec rm {} + 2>/dev/null || true
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Access to hidden dotfiles in home directory

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75_PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null || echo "true")
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Access to hidden dotfiles in home directory

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76_PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
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Access to hidden dotfiles in home directory

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79_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
low line 83

Access to hidden dotfiles in home directory

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83source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
low line 86

Access to hidden dotfiles in home directory

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86_LAKE_SEEN=$([ -f ~/.gstack/.completeness-intro-seen ] && echo "yes" || echo "no")
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Access to hidden dotfiles in home directory

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88_TEL=$(~/.claude/skills/gstack/bin/gstack-config get telemetry 2>/dev/null || true)
low line 89

Access to hidden dotfiles in home directory

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89_TEL_PROMPTED=$([ -f ~/.gstack/.telemetry-prompted ] && echo "yes" || echo "no")
low line 94

Access to hidden dotfiles in home directory

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94_EXPLAIN_LEVEL=$(~/.claude/skills/gstack/bin/gstack-config get explain_level 2>/dev/null || echo "default")
low line 97

Access to hidden dotfiles in home directory

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97_QUESTION_TUNING=$(~/.claude/skills/gstack/bin/gstack-config get question_tuning 2>/dev/null || echo "false")
low line 99

Access to hidden dotfiles in home directory

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99mkdir -p ~/.gstack/analytics
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Access to hidden dotfiles in home directory

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101echo '{"skill":"investigate","ts":"'$(date -u +%Y-%m-%dT%H:%M:%SZ)'","repo":"'$(basename "$(git rev-parse --show-toplevel 2>/dev/null)" 2>/dev/null || echo "unknown")'"}' >> ~/.gstack/analytics/skill
low line 103

Access to hidden dotfiles in home directory

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103for _PF in $(find ~/.gstack/analytics -maxdepth 1 -name '.pending-*' 2>/dev/null); do
low line 105

Access to hidden dotfiles in home directory

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105if [ "$_TEL" != "off" ] && [ -x "~/.claude/skills/gstack/bin/gstack-telemetry-log" ]; then
low line 106

Access to hidden dotfiles in home directory

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106~/.claude/skills/gstack/bin/gstack-telemetry-log --event-type skill_run --skill _pending_finalize --outcome unknown --session-id "$_SESSION_ID" 2>/dev/null || true
low line 112

Access to hidden dotfiles in home directory

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112eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)" 2>/dev/null || true
low line 118

Access to hidden dotfiles in home directory

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118~/.claude/skills/gstack/bin/gstack-learnings-search --limit 3 2>/dev/null || true
low line 123

Access to hidden dotfiles in home directory

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123~/.claude/skills/gstack/bin/gstack-timeline-log '{"skill":"investigate","event":"started","branch":"'"$_BRANCH"'","session":"'"$_SESSION_ID"'"}' 2>/dev/null &
low line 128

Access to hidden dotfiles in home directory

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128_ROUTING_DECLINED=$(~/.claude/skills/gstack/bin/gstack-config get routing_declined 2>/dev/null || echo "false")
low line 139

Access to hidden dotfiles in home directory

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139_CHECKPOINT_MODE=$(~/.claude/skills/gstack/bin/gstack-config get checkpoint_mode 2>/dev/null || echo "explicit")
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Access to hidden dotfiles in home directory

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140_CHECKPOINT_PUSH=$(~/.claude/skills/gstack/bin/gstack-config get checkpoint_push 2>/dev/null || echo "false")
medium line 148

Access to hidden dotfiles in home directory

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148In plan mode, allowed because they inform the plan: `$B`, `$D`, `codex exec`/`codex review`, writes to `~/.gstack/`, writes to the plan file, and `open` for generated artifacts.
medium line 156

Access to hidden dotfiles in home directory

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156If `SKILL_PREFIX` is `"true"`, suggest/invoke `/gstack-*` names. Disk paths stay `~/.claude/skills/gstack/[skill-name]/SKILL.md`.
medium line 158

Access to hidden dotfiles in home directory

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158If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with
medium line 163

Access to hidden dotfiles in home directory

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163- Missing `~/.claude/skills/gstack/.feature-prompted-continuous-checkpoint`: AskUserQuestion for Continuous checkpoint auto-commits. If accepted, run `~/.claude/skills/gstack/bin/gstack-config set che
medium line 164

Access to hidden dotfiles in home directory

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164- Missing `~/.claude/skills/gstack/.feature-prompted-model-overlay`: inform "Model overlays are active. MODEL_OVERLAY shows the patch." Always touch marker.
medium line 177

Access to hidden dotfiles in home directory

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177If B: run `~/.claude/skills/gstack/bin/gstack-config set explain_level terse`.
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Access to hidden dotfiles in home directory

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181rm -f ~/.gstack/.writing-style-prompt-pending
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Access to hidden dotfiles in home directory

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182touch ~/.gstack/.writing-style-prompted
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Access to hidden dotfiles in home directory

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191touch ~/.gstack/.completeness-intro-seen
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204If A: run `~/.claude/skills/gstack/bin/gstack-config set telemetry community`
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Access to hidden dotfiles in home directory

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214If B→A: run `~/.claude/skills/gstack/bin/gstack-config set telemetry anonymous`
medium line 215

Access to hidden dotfiles in home directory

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215If B→B: run `~/.claude/skills/gstack/bin/gstack-config set telemetry off`
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Access to hidden dotfiles in home directory

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219touch ~/.gstack/.telemetry-prompted
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Access to hidden dotfiles in home directory

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232If A: run `~/.claude/skills/gstack/bin/gstack-config set proactive true`
medium line 233

Access to hidden dotfiles in home directory

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233If B: run `~/.claude/skills/gstack/bin/gstack-config set proactive false`
low line 237

Access to hidden dotfiles in home directory

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237touch ~/.gstack/.proactive-prompted
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Access to hidden dotfiles in home directory

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278If B: run `~/.claude/skills/gstack/bin/gstack-config set routing_declined true` and say they can re-enable with `gstack-config set routing_declined false`.
medium line 282

Access to hidden dotfiles in home directory

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282If `VENDORED_GSTACK` is `yes`, warn once via AskUserQuestion unless `~/.gstack/.vendoring-warned-$SLUG` exists:
medium line 294

Access to hidden dotfiles in home directory

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2943. Run `~/.claude/skills/gstack/bin/gstack-team-init required` (or `optional`)
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Access to hidden dotfiles in home directory

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2965. Tell the user: "Done. Each developer now runs: `cd ~/.claude/skills/gstack && ./setup --team`"
low line 302

Access to hidden dotfiles in home directory

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302eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)" 2>/dev/null || true
low line 303

Access to hidden dotfiles in home directory

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303touch ~/.gstack/.vendoring-warned-${SLUG:-unknown}
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Access to hidden dotfiles in home directory

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406_BRAIN_SYNC_BIN="~/.claude/skills/gstack/bin/gstack-brain-sync"
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Access to hidden dotfiles in home directory

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407_BRAIN_CONFIG_BIN="~/.claude/skills/gstack/bin/gstack-config"
medium line 511

Access to hidden dotfiles in home directory

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511If A/B and `~/.gstack/.git` is missing, ask whether to run `gstack-artifacts-init`. Do not block the skill.
low line 516

Access to hidden dotfiles in home directory

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516"~/.claude/skills/gstack/bin/gstack-brain-sync" --discover-new 2>/dev/null || true
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Access to hidden dotfiles in home directory

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517"~/.claude/skills/gstack/bin/gstack-brain-sync" --once 2>/dev/null || true
low line 560

Access to hidden dotfiles in home directory

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560eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
medium line 715

Access to hidden dotfiles in home directory

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715Before each AskUserQuestion, choose `question_id` from `scripts/question-registry.ts` or `{skill}-{slug}`, then run `~/.claude/skills/gstack/bin/gstack-question-preference --check "<id>"`. `AUTO_DECID
low line 719

Access to hidden dotfiles in home directory

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719~/.claude/skills/gstack/bin/gstack-question-log '{"skill":"investigate","question_id":"<id>","question_summary":"<short>","category":"<approval|clarification|routing|cherry-pick|feedback-loop>","door_
low line 728

Access to hidden dotfiles in home directory

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728~/.claude/skills/gstack/bin/gstack-question-preference --write '{"question_id":"<id>","preference":"<pref>","source":"inline-user","free_text":"<optional original words>"}'
low line 748

Access to hidden dotfiles in home directory

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748~/.claude/skills/gstack/bin/gstack-learnings-log '{"skill":"SKILL_NAME","type":"operational","key":"SHORT_KEY","insight":"DESCRIPTION","confidence":N,"source":"observed"}'
medium line 758

Access to hidden dotfiles in home directory

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758`~/.gstack/analytics/`, matching preamble analytics writes.
low line 765

Access to hidden dotfiles in home directory

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765rm -f ~/.gstack/analytics/.pending-"$_SESSION_ID" 2>/dev/null || true
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Access to hidden dotfiles in home directory

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767~/.claude/skills/gstack/bin/gstack-timeline-log '{"skill":"SKILL_NAME","event":"completed","branch":"'$(git branch --show-current 2>/dev/null || echo unknown)'","outcome":"OUTCOME","duration_s":"'"$_T
low line 770

Access to hidden dotfiles in home directory

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770echo '{"skill":"SKILL_NAME","duration_s":"'"$_TEL_DUR"'","outcome":"OUTCOME","browse":"USED_BROWSE","session":"'"$_SESSION_ID"'","ts":"'$(date -u +%Y-%m-%dT%H:%M:%SZ)'"}' >> ~/.gstack/analytics/skill-
low line 773

Access to hidden dotfiles in home directory

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773if [ "$_TEL" != "off" ] && [ -x ~/.claude/skills/gstack/bin/gstack-telemetry-log ]; then
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Access to hidden dotfiles in home directory

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774~/.claude/skills/gstack/bin/gstack-telemetry-log \
medium line 784

Access to hidden dotfiles in home directory

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784In plan mode before ExitPlanMode: if the plan file lacks `## GSTACK REVIEW REPORT`, run `~/.claude/skills/gstack/bin/gstack-review-read` and append the standard runs/status/findings table. With `NO_RE
low line 823

Access to hidden dotfiles in home directory

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823_CROSS_PROJ=$(~/.claude/skills/gstack/bin/gstack-config get cross_project_learnings 2>/dev/null || echo "unset")
low line 826

Access to hidden dotfiles in home directory

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826~/.claude/skills/gstack/bin/gstack-learnings-search --limit 10 --query "debug investigation root cause hypothesis bug fix" --cross-project 2>/dev/null || true
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Access to hidden dotfiles in home directory

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828~/.claude/skills/gstack/bin/gstack-learnings-search --limit 10 --query "debug investigation root cause hypothesis bug fix" 2>/dev/null || true
medium line 843

Access to hidden dotfiles in home directory

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843If A: run `~/.claude/skills/gstack/bin/gstack-config set cross_project_learnings true`
medium line 844

Access to hidden dotfiles in home directory

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844If B: run `~/.claude/skills/gstack/bin/gstack-config set cross_project_learnings false`
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867~/.claude/skills/gstack/bin/gstack-learnings-search --query "<your-keyword>" --limit 5 2>/dev/null || true
low line 885

Access to hidden dotfiles in home directory

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885eval "$(~/.claude/skills/gstack/bin/gstack-paths)"
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Access to hidden dotfiles in home directory

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997~/.claude/skills/gstack/bin/gstack-learnings-log '{"skill":"investigate","type":"investigation","key":"ROOT_CAUSE_KEY","insight":"ROOT_CAUSE_SUMMARY","confidence":9,"source":"observed","files":["affec
low line 1006

Access to hidden dotfiles in home directory

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1006~/.claude/skills/gstack/bin/gstack-learnings-log '{"skill":"investigate","type":"TYPE","key":"SHORT_KEY","insight":"DESCRIPTION","confidence":N,"source":"SOURCE","files":["path/to/relevant/file"]}'
low line 368

Unicode escape sequences

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368writes `\u3103` thinking it is 管 U+7BA1, but `\u3103` is
low line 187

External URL reference

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187If `LAKE_INTRO` is `no`: say "gstack follows the **Boil the Lake** principle — do the complete thing when AI makes marginal cost near-zero. Read more: https://garryslist.org/posts/boil-the-ocean" Offe
low line 190

External URL reference

SourceSKILL.md
190open https://garryslist.org/posts/boil-the-ocean
Scanned on May 12, 2026
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Categorysales
UpdatedMay 13, 2026
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garrytan/gstack