name: mspec-delta description: delta step of mspec workflow — generate Delta Spec with auto-numbered FR-NNN when_to_use: User runs /mspec:delta, or workflow auto-continues to delta
<!-- @mspec-delta 2026-05-15-063805-fix-command-name-consistency/specs/claude-integration/spec.md --> <!-- Requirements implemented: FR-017 --> <!-- Change: fix-command-name-consistency --> <!-- @mspec-delta 2026-05-15-040857-step-checkbox-update/specs/claude-integration/spec.md --> <!-- Requirements implemented: FR-015 --> <!-- Change: step-checkbox-update --> <!-- @mspec-delta 2026-05-17-214224-fix-locale-spec-language/specs/claude-integration/spec.md --> <!-- Requirements implemented: FR-021 --> <!-- Change: fix-locale-spec-language -->Procedure
- Run
mspec status --change <change-dir> --jsonfirst. - Read
proposal.md→ extract capability names from## Capabilities (touched). - For each capability, run
mspec delta init --capability <name> --change <change-dir>. The CLI auto-numbers FR-NNN by reading existingspecs/<name>/spec.md. - Edit each generated
changes/<change-dir>/specs/<capability>/spec.md:- Replace placeholders in
### Requirement: FR-NNN — <Short Title>headers (H3). - Write the Requirement body in EARS format using RFC 2119 keywords with the following semantics (per Constitution):
SHALL— 機能要件(system の振る舞いを規定するデフォルト)MUST— 制約・安全要件(絶対的強制または禁止)SHOULD— 推奨(逸脱可能だが理由が必要)MAY— 任意(オプション機能)
- EARS pattern guidance — read
"locale"from themspec status --jsonoutput (step 1) and use the matching format:- locale=ja の場合:
- Ubiquitous:
このシステムは SHALL <振る舞い>. - Event-Driven:
<トリガー> のとき、このシステムは SHALL <振る舞い>. - State-Driven:
<状態> の間、このシステムは SHALL <振る舞い>. - Unwanted Behavior:
<条件> の場合、このシステムは SHALL <振る舞い>. - Optional Feature:
<機能> が有効な場合、このシステムは SHALL <振る舞い>.
- Ubiquitous:
- locale=en の場合(locale フィールドが undefined の場合も含む):
- Ubiquitous:
The system SHALL <response>. - Event-Driven:
When <trigger>, the system SHALL <response>. - State-Driven:
While <state>, the system SHALL <response>. - Unwanted Behavior:
If <condition>, then the system SHALL <response>. - Optional Feature:
Where <feature>, the system SHALL <response>.
- Ubiquitous:
- locale=ja の場合:
- Add at least one
#### Scenario: <Name>(must be H4) with- GIVEN,- WHEN,- THENbullets nested inside each Requirement.
- Replace placeholders in
readme.mdの## Artifacts節の- [ ] specs/*/spec.md (Delta Spec)を- [x] specs/*/spec.md (Delta Spec)に更新する。- Run
mspec validate --change <change-dir>(validates FR-ID uniqueness and H4 Scenarios). validate が失敗した場合は- [x] specs/*/spec.md (Delta Spec)を- [ ] specs/*/spec.md (Delta Spec)にロールバックする。 block: false— auto-continue via/mspec:continue.
Verification (C2)
mspec validate --change <change>— アーティファクト整合性チェックmspec anchor check --change <change>— アンカー解決確認mspec spec lint— Delta Spec実装詳細漏洩チェック
Learning (C3)
このスキルの実行で発生した学習候補を記録する:
<!-- LEARNING: <パターン説明> | source: <FR-ID> | confidence: low|medium|high -->
mspec learn コマンドが archive 済み changes からこれらを収集してpost-condition候補をproposeする。
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