technical-spec

Generate a technical specification document for the current project.

Workflow

Copy this checklist and track progress:

Technical Spec Progress:
- [ ] Step 1: Directory guard
- [ ] Step 2: Project root confirmation
- [ ] Step 3: Check prerequisites (plans/greenfield/PRODUCT_SPEC.md)
- [ ] Step 4: Check for existing plans/greenfield/TECHNICAL_SPEC.md
- [ ] Step 5: Conduct guided Q&A with user
- [ ] Step 6: Cross-verify against PRODUCT_SPEC.md
- [ ] Step 7: Handle deferred decisions
- [ ] Step 8: Review and refine with user
- [ ] Step 9: Suggest next step (/generate-plan)

Lean Mode (--lean)

When --lean is passed:

• •Web research runs in background: Launch all WebSearch research as background Agent calls (run_in_background: true). Continue the Q&A without waiting. When results arrive, only interrupt the flow if a finding would materially change a recommendation (e.g., a critical production issue with a chosen technology, a clearly superior alternative, a deprecation or breaking change). Skip routine benchmark comparisons and ecosystem summaries.
• •Skip all post-generation gates. Do not run /verify-spec, /codex-consult, or /criteria-audit. Report each as LEAN_SKIP in the output.

Directory Guard

1. •If .toolkit-marker exists in the current working directory → STOP: "You're in the toolkit repo. Run this from your project directory instead: cd ~/Projects/your-project && /technical-spec"

Project Root Confirmation

Before generating any files, confirm the output location with the user:

Will write TECHNICAL_SPEC.md to: {absolute path of cwd}/plans/greenfield/
Continue? (Yes / Change directory)

If the user says "Change directory", ask for the correct path and instruct them to cd there first.

Prerequisites

• •Check for plans/greenfield/PRODUCT_SPEC.md first.
• •If it does not exist, fall back to legacy PRODUCT_SPEC.md in the current directory.
• •If the legacy root file is used, copy it to plans/greenfield/PRODUCT_SPEC.md before continuing so the project adopts the canonical layout.
• •If neither exists: "PRODUCT_SPEC.md not found. Run /product-spec first."

Existing File Guard (Prevent Overwrite)

Before asking any questions, ensure plans/greenfield/ exists, then check whether plans/greenfield/TECHNICAL_SPEC.md already exists.

• •If it does not exist: continue normally.
• •If it exists: STOP and ask the user what to do:
  1. •Backup then overwrite (recommended): read the existing file and write it to plans/greenfield/TECHNICAL_SPEC.md.bak.YYYYMMDD-HHMMSS, then write the new document to plans/greenfield/TECHNICAL_SPEC.md
  2. •Overwrite: replace plans/greenfield/TECHNICAL_SPEC.md with the new document
  3. •Abort: do not write anything; suggest they rename/move the existing file first

Process

Read .claude/skills/technical-spec/PROMPT.md and follow its instructions exactly:

1. •Read plans/greenfield/PRODUCT_SPEC.md as input
2. •Work through each question category (Architecture, Stack, Data, APIs, Implementation)
3. •Make recommendations with confidence levels
4. •Generate the final TECHNICAL_SPEC.md document

Output

Write the completed specification to plans/greenfield/TECHNICAL_SPEC.md.

Post-Generation Gates (MANDATORY unless --lean)

These gates MUST execute before you produce the "Next Step" output. The output template requires results from each gate. Reporting SKIPPED without --lean is a skill violation — go back and run the gate.

Gate 1: Spec Verification

After writing plans/greenfield/TECHNICAL_SPEC.md, run the spec-verification workflow:

1. •Read .claude/skills/spec-verification/SKILL.md for the verification process
2. •Verify context preservation: Check that all key items from PRODUCT_SPEC.md appear in TECHNICAL_SPEC.md
3. •Run quality checks for vague language, missing rationale, undefined contracts
4. •Present any CRITICAL issues to the user with resolution options
5. •Apply fixes based on user choices
6. •Re-verify until clean or max iterations reached

IMPORTANT: Do not proceed to Gate 2 until verification passes or user explicitly chooses to proceed with noted issues.

Deferred Requirements Capture (During Q&A)

IMPORTANT: Capture deferred requirements interactively during the Q&A process, not after.

When to Trigger

During the Q&A, watch for signals that the user is deferring a technical decision:

• •"out of scope"
• •"not for MVP" / "post-MVP"
• •"v2" / "future version"
• •"premature optimization"
• •"over-engineering" / "overkill"
• •"later" / "eventually"
• •"we'll skip that for now"
• •"keep it simple for now"

Capture Flow

When you detect a deferral signal, immediately use AskUserQuestion:

Question: "Would you like to save this to your deferred requirements?"
Header: "Defer?"
Options:
  - "Yes, capture it" — I'll ask a few quick questions to document it
  - "No, skip" — Don't record this

If user selects "Yes, capture it":

Ask these clarifying questions:

1. •

   What's being deferred? "In one sentence, what's the technical decision or feature?" (Pre-fill with your understanding from context)

2. •

   Why defer it? Options: "Premature optimization" / "Over-engineering for MVP" / "Needs more research" / "V2 feature" / "Other"

3. •

   Notes for later? "Any technical context that will help when revisiting this?" (Optional — user can skip)

Write to DEFERRED.md Immediately

After collecting answers, append to DEFERRED.md right away.

If this is the first technical spec entry, add a new section:

## From plans/greenfield/TECHNICAL_SPEC.md ({date})

| Requirement | Reason | Notes |
|-------------|--------|-------|
| {user's answer} | {selected reason} | {notes or "—"} |

If section exists, append row:

| {user's answer} | {selected reason} | {notes or "—"} |

Continue Q&A

After capturing (or skipping), continue the spec Q&A where you left off.

Gate 2: Cross-Model Review

After verification passes, run cross-model review if Codex CLI is available:

1. •Check if Codex CLI is installed: codex --version
2. •If available, run /codex-consult with upstream context
3. •Present any findings to the user before proceeding

Consultation invocation:

/codex-consult --upstream plans/greenfield/PRODUCT_SPEC.md --research "{detected technologies}" plans/greenfield/TECHNICAL_SPEC.md

If Codex finds issues:

• •Show critical issues and recommendations
• •Ask user: "Address findings before proceeding?" (Yes/No)
• •If Yes: Apply suggested fixes
• •If No: Continue with noted issues

If Codex CLI is not installed or not authenticated: Report UNAVAILABLE (not SKIPPED — the distinction matters).

Error Handling

Next Step

Pre-condition: All gates above have completed, or --lean was explicitly passed. If you have not run them, STOP and run them now. Reporting SKIPPED without --lean is a skill violation.

When complete, inform the user:

TECHNICAL_SPEC.md created and verified at ./plans/greenfield/TECHNICAL_SPEC.md

Verification: PASSED | PASSED WITH NOTES | NEEDS REVIEW | LEAN_SKIP
Cross-Model Review: PASSED | PASSED WITH NOTES | UNAVAILABLE | LEAN_SKIP
Deferred Requirements: {count} items captured to DEFERRED.md

Next: Run /generate-plan