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openspec-sync-specs

✓ Official★ 753

by getsentry · part of getsentry/sentry-mcp

Sync delta specs from a change to main specs. Use when the user wants to update main specs with changes from a delta spec, without archiving the change.

🧰 Not standalone. This skill ships with getsentry/sentry-mcp and only works together with that tool — install the tool first, then add this skill.

This is the playbook your agent receives when the skill activates — you don't need to read it to use the skill, but it's here to audit before installing.

Sync delta specs from a change to main specs.

This is an agent-driven operation - you will read delta specs and directly edit main specs to apply the changes. This allows intelligent merging (e.g., adding a scenario without copying the entire requirement).

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

  1. If no change name provided, prompt for selection

    Run openspec list --json to get available changes. Use the AskUserQuestion tool to let the user select.

    Show changes that have delta specs (under specs/ directory).

    IMPORTANT: Do NOT guess or auto-select a change. Always let the user choose.

  2. Resolve change context

    Run:

    openspec status --change "<name>" --json

    If status reports actionContext.mode: "workspace-planning", explain that workspace spec sync is not supported in this slice and STOP. Do not fall back to repo-local paths or edit linked repos.

  3. Find delta specs

    Use artifactPaths.specs.existingOutputPaths from the status JSON as the list of delta spec files.

    Each delta spec file contains sections like:

    • ## ADDED Requirements - New requirements to add
    • ## MODIFIED Requirements - Changes to existing requirements
    • ## REMOVED Requirements - Requirements to remove
    • ## RENAMED Requirements - Requirements to rename (FROM:/TO: format)

    If no delta specs found, inform user and stop.

  4. For each delta spec, apply changes to main specs

    For each repo-local capability delta spec path returned by the CLI:

    a. Read the delta spec to understand the intended changes

    b. Read the main spec at openspec/specs/<capability>/spec.md (may not exist yet)

    c. Apply changes intelligently:

    ADDED Requirements:

    • If requirement doesn't exist in main spec → add it
    • If requirement already exists → update it to match (treat as implicit MODIFIED)

    MODIFIED Requirements:

    • Find the requirement in main spec
    • Apply the changes - this can be:
      • Adding new scenarios (don't need to copy existing ones)
      • Modifying existing scenarios
      • Changing the requirement description
    • Preserve scenarios/content not mentioned in the delta

    REMOVED Requirements:

    • Remove the entire requirement block from main spec

    RENAMED Requirements:

    • Find the FROM requirement, rename to TO

    d. Create new main spec if capability doesn't exist yet:

    • Create openspec/specs/<capability>/spec.md
    • Add Purpose section (can be brief, mark as TBD)
    • Add Requirements section with the ADDED requirements

  5. Show summary

    After applying all changes, summarize:

    • Which capabilities were updated
    • What changes were made (requirements added/modified/removed/renamed)

Delta Spec Format Reference


## Specs Synced: <change-name>

Updated main specs:

**<capability-1>**:
- Added requirement: "New Feature"
- Modified requirement: "Existing Feature" (added 1 scenario)

**<capability-2>**:
- Created new spec file
- Added requirement: "Another Feature"

Main specs are now updated. The change remains active - archive when implementation is complete.

Guardrails

  • Read both delta and main specs before making changes
  • Preserve existing content not mentioned in delta
  • If something is unclear, ask for clarification
  • Show what you're changing as you go
  • The operation should be idempotent - running twice should give same result