OpenSpec is a specification-driven development framework that records software requirements and implementation plans as readable Markdown artifacts. It helps developers and AI coding assistants agree on what should be built before code is written, including work spanning multiple repositories. The catalogue add-ons provide workflow skills and instructions for using OpenSpec.
Borrowing it
Nothing to install: this file belongs to Fission-AI/OpenSpec. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Fission-AI/OpenSpec/main/.agents/skills/release-openspec/SKILL.mdgit clone --depth 1 https://github.com/Fission-AI/OpenSpecWrote 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/fission-ai/openspec/release-openspec)<a href="https://agentmods.dev/skills/fission-ai/openspec/release-openspec"><img src="https://agentmods.dev/badge/skills/fission-ai/openspec/release-openspec/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/fission-ai/openspec/release-openspec"><img src="https://agentmods.dev/badge/skills/fission-ai/openspec/release-openspec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector pass
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 | $0.00088 | $0.02870 |
| Opus 5.5 | $0.00035 | $0.01148 |
| Sonnet 5.5 | $0.00018 | $0.00574 |
| Haiku 4.5 | $0.00009 | $0.00287 |
Grade A, and why
release-openspec 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 6d 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 — 182 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Release OpenSpec
Run the OpenSpec release workflow as a resumable state machine. Inspect live GitHub state on every invocation and take only the next safe action. Do not assume an earlier invocation completed.
Principles
- Treat
Fission-AI/OpenSpecandorigin/mainas the release source of truth. - Default to a read-only audit when the user asks for status, readiness, or advice.
- Treat a request to release, prepare a release, continue, or resume as authorization to perform the applicable release actions.
- Preserve the user's checkout. Never discard unrelated changes or switch their current branch just to prepare a changeset.
- Use a temporary worktree from current
origin/mainfor release-authored commits when the checkout is dirty or not onmain. - Never approve your own PR. Human review is a deliberate gate.
- Treat merge-queue entry as an intermediate state, not a merge. Advance only after GitHub reports
mergedAtand the commit is present onmain. - Never create the automated Version Packages PR manually. The Changesets action owns it.
- Never push an empty commit merely to retrigger CI. Diagnose the failed or missing run first.
- Report URLs, the state reached, and the exact human action needed whenever pausing.
Know the two PR types
Keep these distinct in output and decisions:
- Changeset PR: A normal human-authored PR that adds one or more
.changeset/*.mdfiles. Prefer adding a changeset to the feature/fix PR; create a catch-up changeset PR only for already-merged work that should be included. - Version Packages PR: The automated
changeset-release/mainPR titledchore(release): version packages. Merging or adding changesets tomainupdates this same PR. Merging it publishes the stable release.
An open Version Packages PR does not prohibit a catch-up changeset PR. It means a catch-up PR is useful only when the audit finds missing release-worthy work. Once that PR merges, wait for the existing Version Packages PR to update.
What ships with it
2 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.
- 6d ago Changed 2c533267f8c2
- 13d ago Changed · +1 lines df6977c31729
- 2mo ago First seen · 181 lines · 88 tokens per session scan A 56b391b3b4e8
release-openspec is a skill published in the GitHub repository Fission-AI/OpenSpec (74,064 stars, last pushed yesterday), licensed MIT. It adds 88 tokens to every session and 2,870 once invoked, about $0.0004 per session on Opus 5.5. 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.
release-openspec compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| release-openspecFission-AI/OpenSpec | Skill | 74k | yesterday | MIT | A | 88 | Codex |
| add-community-extensiongithub/spec-kit | Skill | 148k | yesterday | MIT | A | 63 | Claude Code |
| code-reviewgithub/spec-kit | Skill | 148k | yesterday | MIT | A | 54 | Claude Code |
| gsd-complete-milestoneopen-gsd/gsd-core | Skill | 11k | yesterday | MIT | A | 16 | Claude Code |
| comet-archiverpamis/comet | Skill | 3.3k | today | MIT | A | 34 | Codex |
| comet-releaserpamis/comet | Skill | 3.3k | today | MIT | A | 65 | Claude Code, Codex |
| comet-safe-deliveryrpamis/comet | Skill | 3.3k | today | MIT | A | 78 | Claude Code, Codex |