Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add specstoryai/agent-skills --skill specstory-guardgit clone --depth 1 https://github.com/specstoryai/agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/specstoryai/agent-skills/specstory-guard)<a href="https://agentmods.dev/skills/specstoryai/agent-skills/specstory-guard"><img src="https://agentmods.dev/badge/skills/specstoryai/agent-skills/specstory-guard/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/specstoryai/agent-skills/specstory-guard"><img src="https://agentmods.dev/badge/skills/specstoryai/agent-skills/specstory-guard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.01222 |
| Opus 5 | $0.00024 | $0.00611 |
| Sonnet 5 | $0.00010 | $0.00244 |
| Haiku 4.5 | $0.00005 | $0.00122 |
Grade A, and why
specstory-guard scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SpecStory Guard
A pre-commit guardrail that scans .specstory/history for potential secrets and blocks commits until they are removed or redacted.
How It Works
- Installs a git pre-commit hook in your repository
- Scans
.specstory/historyfiles on every commit - Detects common secret patterns (API keys, tokens, private keys)
- Blocks the commit if secrets are found
- Reports findings with redacted previews for safe review
Why Use Guard?
AI coding sessions may inadvertently capture sensitive data:
- API keys you pasted into chat
- Environment variables in command output
- Private keys or tokens in error messages
- Credentials in configuration examples
Guard prevents accidental commits of these secrets.
Usage
Slash Command
| User says | Action |
|---|---|
/specstory-guard |
Install the pre-commit hook |
/specstory-guard install |
Install the pre-commit hook |
/specstory-guard scan |
Run a manual scan without installing |
/specstory-guard check |
Alias for scan |
/specstory-guard uninstall |
Remove the pre-commit hook |
Direct Script Usage
# Install the pre-commit hook
python skills/specstory-guard/scripts/guard.py install
# Run a manual scan
python skills/specstory-guard/scripts/guard.py scan --root .
# Uninstall the hook
python skills/specstory-guard/scripts/guard.py uninstall
# Scan with custom allowlist
SPECSTORY_GUARD_ALLOWLIST='example-key,PLACEHOLDER_.*' \
python skills/specstory-guard/scripts/guard.py scan --root .
Output
Scan with findings:
SpecStory Guard - Security Scan
===============================
Scanning .specstory/history/...
ALERT: Potential secrets found!
File: .specstory/history/2026-01-22_19-20-56Z-api-setup.md
Line 142: AWS_SECRET_ACCESS_KEY=AKIA...redacted...XYZ
Line 289: private_key: "-----BEGIN RSA PRIVATE KEY-----..."
File: .specstory/history/2026-01-20_10-15-33Z-debug-auth.md
Line 56: Authorization: Bearer eyJhbG...redacted...
Total: 3 potential secrets in 2 files
Commit blocked. Please redact or remove these secrets before committing.
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 168 lines · 49 tokens per session scan A 170d30b32302
specstory-guard is a skill published in the GitHub repository specstoryai/agent-skills (35 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 49 tokens to every session and 1,222 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
next-step
Change-aware next step advisor. Use when: user asks what to do next, workflow progression is unclear, session just started with dirty worktree. Not for: executing the suggested command (user decides), auto-loop decisions (hooks handle that). Output: findings-based suggestions or session summary with commit seed.
precommit
Pre-commit checks — lint:fix -> build -> test.
precommit-fast
Quick pre-commit checks — lint:fix -> test.
smart-commit
Smart batch commit. Analyzes uncommitted changes, groups by cohesion, generates commit messages matching project style. Default: output git commands for manual execution. With --execute: directly run git add + git commit (requires user approval). Use when: user says 'commit', 'batch commit', 'prepare commit', 'write…
vibe-cherry-pick-integration
Safely integrates commits from parallel agent branches using sequential cherry-pick. Use after parallel work completes in isolated branches or worktrees.
vibe-pre-commit-audit
Scans staged changes for secrets, debug statements, TODOs without references, and other common commit mistakes. Use before creating any commit.