
OpenSpec Propose
FreeQuickly generate planning artifacts for new changes.
Free · Opens the source repo
What OpenSpec Propose does
OpenSpec Propose is a command-line skill designed to streamline the process of generating planning artifacts for proposed changes in software projects. This skill allows developers and designers to quickly articulate their ideas and receive a comprehensive proposal that includes essential documentation such as a project proposal, specifications, design details, and implementation tasks. By automating the creation of these artifacts, OpenSpec Propose reduces the time and effort typically required for project planning.
The skill operates by taking user input in the form of a change name or description and generates a structured set of artifacts based on a predefined schema. The artifacts include a proposal.md file detailing the 'what' and 'why' of the change, a specifications document that outlines the system's required capabilities, a design document explaining the approach, and a tasks list that breaks down the implementation steps. This ensures that all necessary planning documentation is created in one cohesive workflow.
OpenSpec Propose is particularly beneficial for teams that follow a spec-driven development process, as it helps maintain consistency and organization in project documentation. It is ideal for developers and designers who need to propose new features or changes without getting bogged down in the details of implementation at the outset. Instead, the focus remains on planning and outlining the necessary steps before any coding begins.
However, it is important to note that OpenSpec Propose is strictly a planning tool. It does not execute any code changes or modifications to the project itself. After generating the planning artifacts, users must initiate a separate workflow to implement the proposed changes. This separation ensures that planning and execution phases are clearly delineated, which can help prevent scope creep and maintain project clarity.
When to use it
Use OpenSpec Propose when you need to quickly outline a new feature or change and generate all necessary planning documents in one go.
When not to use it
This skill is not suitable for direct code changes or when you need to implement changes immediately, as it focuses solely on planning artifacts.
What you can build with it
Proposing a New Feature
When a developer wants to propose a new feature, they can describe it to OpenSpec Propose, which will generate all necessary planning documents.
Planning a System Update
A team lead can use this skill to outline the steps and requirements for updating an existing system component, ensuring all aspects are documented.
Documenting a Bug Fix
When addressing a bug, a developer can utilize OpenSpec Propose to create a structured proposal that outlines the fix and necessary changes.
How to install OpenSpec Propose
View source1. Install with the skills CLI
npx skills add fission-ai/openspec/openspec-propose --agent claude-code2. Or install it manually
Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.
Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs
Inside SKILL.md
Written by fission-aiPropose a new change - create the change and generate all artifacts in one step.
Planning boundary: This workflow creates planning artifacts only. The user request that selected or triggered this workflow authorizes planning only, even if it asks to build or fix something. Do not edit project code. After the planning artifacts are complete, stop. Do not start implementation in the same response, even if the initial request asks for it. Wait for a new user request after the artifacts are presented; then start the apply workflow.
I'll create a change with the artifacts your schema defines. With the default spec-driven schema that is:
- proposal.md (what & why)
specs/<capability-path>/spec.md(what the system must do - a delta, not the main spec)- design.md (how)
- tasks.md (implementation steps)
<capability-path> is the spec directory relative to specs/ (for example, user-auth or identity/user-auth). Preserve an existing capability's full path and follow the project's established organization for new capabilities.
When the user is ready to implement, they must start the apply workflow explicitly.
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, 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.
Input: The user's request should include a change name (kebab-case) OR a description of what they want to build.
Steps
-
Understand the request and clarify material ambiguity
If no clear input is provided, ask the user (open-ended, no preset options):
"What change do you want to work on? Describe what you want to build or fix."
From their description, derive a kebab-case name (e.g., "add user authentication" →
add-user-auth).IMPORTANT: Do NOT proceed without understanding what the user wants to build.
If the request contains ambiguity that would materially affect scope, externally observable behavior, compatibility, or acceptance criteria, ask the user before creating the change. For minor details, make a reasonable assumption and record it in the planning artifacts.
-
Determine the workflow schema
Use the configured default schema unless the user explicitly requests a different workflow.
Use a different schema only if the user:
- Explicitly requests a specific schema by name → use
--schema <schema-name> - Asks to "show workflows" or asks "what workflows" exist → resolve the authoritative root by running
openspec context --jsonfrom the current working directory. If the user explicitly selected a registered store, useopenspec context --json --store "<store-id>". Then runopenspec schemas --jsonwith its working directory set to the returnedroot.pathand let them choose. This preserves roots selected by a localstore:pointer or the globaldefaultStore;schemasdoes not accept--store. If context reports onlyno_openspec_root, runopenspec schemas --jsonfrom the current working directory instead. Do not use this fallback for invalid or unavailable stores.
Otherwise, omit
--schemato preserve the configured default. - Explicitly requests a specific schema by name → use
-
Create the change directory
Choose one schema form below. If a registered store is selected, append
--store "<store-id>"to that command and each later OpenSpec command shown below that accepts--store.Using the configured default:
openspec new change "<name>"Using an explicitly requested schema:
openspec new change "<name>" --schema "<schema-name>"This creates a scaffolded change in the planning home resolved by the CLI with
.openspec.yaml. -
Get the artifact build order
openspec status --change "<name>" --jsonParse the JSON to get:
applyRequires: array of artifact IDs needed before implementation (e.g.,["tasks"])artifacts: list of all artifacts, each with itsstatusand itsrequiresedges (the artifact IDs it directly depends on)planningHome,changeRoot,artifactPaths, andactionContext: path and scope context. Use these instead of assuming repo-local paths.
-
Create every artifact in the required set
Use a todo list to track progress through the artifacts.
Loop through artifacts in dependency order (artifacts with no pending dependencies first):
a. For each artifact that is
ready(dependencies satisfied):- Get instructions:
openspec instructions <artifact-id> --change "<name>" --json - The instructions JSON includes:
context: Project background (constraints for you - do NOT include in output)rules: Artifact-specific rules (constraints for you - do NOT include in output)template: The structure to use for your output fileinstruction: Schema-specific guidance for this artifact typeskipped/warning: present when the change declares skip_specs and this artifact must NOT be created - stop and pick another artifactresolvedOutputPath: Resolved path or pattern to write the artifactdependencies: Completed artifacts to read for context
- Read any completed dependency files for context - always re-read them from disk, even if you saw them earlier in the conversation (the user may have edited them)
- If the
instructionfield delegates creation to a specific skill or command, invoke it to produce the artifact instead of writing the file yourself, then verify the artifact file exists atresolvedOutputPath - Otherwise create the artifact file using
templateas the structure and write it toresolvedOutputPath. IfresolvedOutputPathis a glob, followinstructionto choose the concrete file path - Apply
contextandrulesas constraints - but do NOT copy them into the file - Show brief progress: "Created <artifact-id>"
b. Continue until every artifact in the required set exists (not just
apply.requires)- After creating each artifact, re-run
openspec status --change "<name>" --json - The required set is
applyRequiresplus every artifact reachable from those by following therequiresedges instatus --json- walk them transitively (spec-driven closes over proposal, specs, design, tasks). Leave artifacts outside that set alone statusis file-existence only, so anapplyRequiresartifact readingdonedoes NOT mean its dependencies exist - writingtasks.mdearly markstasksdone whilespecswas never written. Use each artifact'srequiresedges, not itsstatus, to build the required set: adoneartifact still lists what it depends on- An artifact already reading
status: "skipped"is satisfied: the change declaresskip_specsin.openspec.yaml, so its files must NOT exist. Never try to create one - Create every artifact in the required set that is missing, then re-check - creating one can unblock others
- Skip one only when
statusalready reports itskipped, or when its owninstructionsays it is conditional: runopenspec instructions <artifact-id> --change "<name>" --jsonand skip only if itsinstructionfield marks it optional (e.g. "create only if..."). Spec-driven'sdesign.mdqualifies;specsqualifies only via theskippedstatus above, never by your own judgment. Tell the user, and do not reconsider it - Dependencies are enablers, not gates: if a required artifact is still
blockedonly because you skipped a conditional dependency, write it anyway - Stop when every artifact in the required set is
done,skipped, or was deliberately skipped
c. If an artifact requires user input (unclear context):
- Ask the user to clarify
- Then continue with creation
- Get instructions:
-
Show final status
openspec status --change "<name>"
Output
After completing all artifacts, summarize:
- Change name and location
- List of artifacts created with brief descriptions, plus any conditional artifact you skipped and why
- What's ready: "All artifacts needed for implementation are ready."
- Prompt: "The artifacts are ready for review. When you are ready, run
/openspec-apply-changeor ask me to apply this change."
Artifact Creation Guidelines
- Follow the
instructionfield fromopenspec instructionsfor each artifact type - it is the authoritative guidance, even for familiar artifact names - If the
instructionfield directs you to use a specific skill or command to create the artifact, invoke it instead of writing the artifact directly - The schema defines what each artifact should contain - follow it
- Read dependency artifacts for context before creating new ones
- Use
templateas the structure for your output file - fill in its sections - IMPORTANT:
contextandrulesare constraints for YOU, not content for the file- Do NOT copy
<context>,<rules>,<project_context>blocks into the artifact - These guide what you write, but should never appear in the output
- Do NOT copy
Guardrails
- The request that invoked this workflow authorizes planning only. Any implementation or apply instruction in that request does not carry forward. Do NOT implement the change, start the apply workflow, or edit project code during this workflow. After presenting the artifacts, stop and wait for a new user request to start the apply workflow
- Create every artifact the apply phase transitively depends on, not just the ids listed in
apply.requires - Always read dependency artifacts before creating a new one - re-read from disk, not from conversation memory (files may have changed since you last saw them)
- Ask about ambiguities that would materially change scope, externally observable behavior, compatibility, or acceptance criteria; for minor details, make reasonable assumptions and record them
- If a change with that name already exists, ask if user wants to continue it or create a new one
- Verify each artifact file exists after writing before proceeding to next
Frequently asked questions about OpenSpec Propose
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