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 heurema/signum --skill openspec-archive-changegit clone --depth 1 https://github.com/heurema/signumWrote 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/heurema/signum/openspec-archive-change)<a href="https://agentmods.dev/skills/heurema/signum/openspec-archive-change"><img src="https://agentmods.dev/badge/skills/heurema/signum/openspec-archive-change/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/heurema/signum/openspec-archive-change"><img src="https://agentmods.dev/badge/skills/heurema/signum/openspec-archive-change.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 | $0.00031 | $0.01145 |
| Opus 5 | $0.00015 | $0.00573 |
| Sonnet 5 | $0.00006 | $0.00229 |
| Haiku 4.5 | $0.00003 | $0.00114 |
Grade A, and why
openspec-archive-change 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 9d 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.
This is a copy
94% identical to openspec-archive-change — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Archive a completed change in the experimental workflow.
Store selection: If the user names a store (a store is a standalone OpenSpec repo registered on this machine) or the work lives in one, run openspec store list --json to discover registered store ids, then pass --store <id> on the commands that read or write specs and changes (new change, status, instructions, list, show, validate, archive, doctor, context). Other commands do not take the flag. Hints printed by commands already carry the flag; keep it on follow-ups. Without a store, commands act on the nearest local openspec/ root.
Input: Optionally specify a change name. If omitted, check if it can be inferred from conversation context. If vague or ambiguous you MUST prompt for available changes.
Steps
-
If no change name provided, prompt for selection
Run
openspec list --jsonto get available changes. Use the AskUserQuestion tool to let the user select.Show only active changes (not already archived). Include the schema used for each change if available.
IMPORTANT: Do NOT guess or auto-select a change. Always let the user choose.
-
Check artifact completion status
Run
openspec status --change "<name>" --jsonto check artifact completion.Parse the JSON to understand:
schemaName: The workflow being usedplanningHome,changeRoot,artifactPaths, andactionContext: path and scope contextartifacts: List of artifacts with their status (doneor other)
If any artifacts are not
done:- Display warning listing incomplete artifacts
- Use AskUserQuestion tool to confirm user wants to proceed
- Proceed if user confirms
-
Check task completion status
Read the tasks file (typically
tasks.md) to check for incomplete tasks.Count tasks marked with
- [ ](incomplete) vs- [x](complete).If incomplete tasks found:
- Display warning showing count of incomplete tasks
- Use AskUserQuestion tool to confirm user wants to proceed
- Proceed if user confirms
If no tasks file exists: Proceed without task-related warning.
-
Assess delta spec sync state
Use
artifactPaths.specs.existingOutputPathsfrom status JSON to check for delta specs. If none exist, proceed without sync prompt.If delta specs exist:
- Compare each delta spec with its corresponding main spec at
openspec/specs/<capability>/spec.md - Determine what changes would be applied (adds, modifications, removals, renames)
- Show a combined summary before prompting
Prompt options:
- If changes needed: "Sync now (recommended)", "Archive without syncing"
- If already synced: "Archive now", "Sync anyway", "Cancel"
If user chooses sync, use Task tool (subagent_type: "general-purpose", prompt: "Use Skill tool to invoke openspec-sync-specs for change ''. Delta spec analysis: "). Proceed to archive regardless of choice.
- Compare each delta spec with its corresponding main spec at
-
Perform the archive
Create an
archivedirectory underplanningHome.changesDirif it doesn't exist:mkdir -p "<planningHome.changesDir>/archive"Generate target name using current date:
YYYY-MM-DD-<change-name>Check if target already exists:
- If yes: Fail with error, suggest renaming existing archive or using different date
- If no: Move
changeRootto the archive directory
mv "<changeRoot>" "<planningHome.changesDir>/archive/YYYY-MM-DD-<name>" -
Display summary
Show archive completion summary including:
- Change name
- Schema that was used
- Archive location
- Whether specs were synced (if applicable)
- Note about any warnings (incomplete artifacts/tasks)
Output On Success
## Archive Complete
**Change:** <change-name>
**Schema:** <schema-name>
**Archived to:** the archive path derived from `planningHome.changesDir`/YYYY-MM-DD-<name>/
**Specs:** ✓ Synced to main specs (or "No delta specs" or "Sync skipped")
All artifacts complete. All tasks complete.
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.
- 9d ago First seen · 119 lines · 31 tokens per session scan A 85c8764715a1
openspec-archive-change is a skill published in the GitHub repository heurema/signum (18 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 1,145 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to openspec-archive-change, differing in 7 lines, and is treated as a copy.
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