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.
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 Fission-AI/OpenSpec --skill openspec-continue-changegit 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/openspec-continue-change)<a href="https://agentmods.dev/skills/fission-ai/openspec/openspec-continue-change"><img src="https://agentmods.dev/badge/skills/fission-ai/openspec/openspec-continue-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/fission-ai/openspec/openspec-continue-change"><img src="https://agentmods.dev/badge/skills/fission-ai/openspec/openspec-continue-change.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- 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 | $0.00056 | $0.02396 |
| Opus 5.5 | $0.00022 | $0.00958 |
| Sonnet 5.5 | $0.00011 | $0.00479 |
| Haiku 4.5 | $0.00006 | $0.00240 |
Grade A, and why
openspec-continue-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 yesterday.
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.
Copies of this mod
8 near-identical copies found in the catalogue:
- openspec-continue-change — 98% identical, 39 lines differ
- openspec-continue-change — 97% identical, 39 lines differ
- openspec-continue-change — 97% identical, 37 lines differ
- openspec-continue-change — 95% identical, 37 lines differ
- openspec-continue-change — 95% identical, 37 lines differ
- openspec-continue-change — 86% identical, 73 lines differ
- openspec-continue-change — 86% identical, 73 lines differ
- openspec-continue-change — 86% identical, 73 lines differ
How it starts
The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Continue working on a change by creating the next artifact.
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, schemas, view). Once selected, treat --store <id> as sticky for the rest of the workflow. Every unscoped example of those commands below is shorthand: before running it, append the flag. For example, run openspec status --change "<name>" --json --store "<id>", not the unscoped form shown below. 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.
Project check: These steps expect a project that already uses OpenSpec. Before the first step that writes anything (new change, archive, sync specs, or authoring an artifact file), confirm the project has a root: run openspec list --json (with --store <id> when a store is selected, since the store is then the root) and read root. A root object means the project is set up. "root": null means it is not - there is no openspec/ directory here, and a write such as openspec new change would create one as a side effect. The command also exits non-zero, which is that answer rather than a broken CLI, so read the JSON instead of retrying or working around it.
One "root": null is not about setup: when a status error message starts with Declared in or Invalid store declaration in and names this project's openspec/config.yaml (or config.yml), the project does use OpenSpec through a store it declares, which this machine cannot resolve (the store is not registered, or the store: line is malformed). Do not treat it as uninitialized and skip the branches below: stop before writing and show the user that error's message and fix.
Otherwise, with no root, what happens next depends on how this workflow was reached:
- Auto-selected: you chose this workflow yourself, without the user naming OpenSpec, naming this skill, or running its slash command. Stop using OpenSpec and answer the request normally, as you would with no OpenSpec installed. Do not ask them to set anything up and do not mention OpenSpec setup.
- Explicit OpenSpec request: the user named OpenSpec, named this skill, or ran its slash command. Stop before writing and ask how to proceed: set this project up (
openspec init), target a store they already have (--store <id>), or continue without OpenSpec for this request. Wait for their answer.
In both branches, never create the root as a side effect: do not run openspec init until the user asks for it, do not hand-create openspec/ files, and do not let a command create it.
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
-
Select the change
If a name is provided, use it. Otherwise:
- Infer from conversation context if the user mentioned a change
- Auto-select if only one active change exists
- If ambiguous, run
openspec list --jsonto get available changes sorted by most recently modified, and ask the user to select one
When prompting, present the top 3-4 most recently modified changes as options, showing:
- Change name
- Status (e.g., "0/5 tasks", "complete", "no tasks")
- How recently it was modified (from
lastModifiedfield)
Mark the most recently modified change as "(Recommended)" since it's likely what the user wants to continue.
Always announce: "Using change: " and how to override (e.g.,
/openspec-continue-change <other>). -
Check current status
openspec status --change "<name>" --jsonParse the JSON to understand current state. The response includes:
schemaName: The workflow schema being used (e.g., "spec-driven")artifacts: Array of artifacts with their status ("done", "skipped", "ready", "blocked")isPlanningComplete: Boolean indicating if all planning artifacts are complete. Older CLI versions expose the same value asisComplete.planningHome,changeRoot,artifactPaths, andactionContext: path and scope context. Use these instead of assuming repo-local paths.
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.
- yesterday Changed · +3 lines 2c63e2828d78
- 13d ago Changed · +7 lines ff4739969b00
- 25d ago Changed · -1 lines 3be9ba5305b4
- 1mo ago Changed · +11 lines · +17 tokens per session 341b63a1fd07
- 1mo ago First seen · 118 lines · 39 tokens per session scan A 5120ec867288
openspec-continue-change is a skill published in the GitHub repository Fission-AI/OpenSpec (72,334 stars, last pushed 2d ago), licensed MIT. It adds 56 tokens to every session and 2,396 once invoked, about $0.0002 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.
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