# Sdd Plan

> Create a baby-step PLAN from an existing PRD (agent PLAN .md, pt-BR default). Feeds sdd-develop. Use when creating a plan or invoking /sdd-plan.

- Skill: `tibursocampos/sdd-plan-3` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tibursocampos/sdd-plan-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tibursocampos/sdd-plan-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Product & Planning
- Author: tibursocampos (https://skillmd.com/u/tibursocampos)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tibursocampos/sdd-plan-3

---


## STOP - Read before ANY tool call

1. Read `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/rules/guardrails.md`
2. Read `_shared/sdd-artifacts/SESSION.md`; load session-state for `$Cwd`
3. If the relevant gate is not approved: **STOP** - ask user **(pt-BR)** - do **NOT** Write/Shell
4. SDD/develop skills: after **ONE** step/task, **STOP** session - handoff only
5. This skill body is **English**; user-facing prompts may be **(pt-BR)**

### Step -1 - Gate check (report in chat before continuing)

```
Gate check:
[ ] guardrails.mdc read
[ ] SESSION.md read; session-state loaded
[ ] PIPELINE.md read (SDD skills only)
[ ] User confirmed current action (sim)
-> If any unchecked: STOP
```

---

# Skill: sdd-plan

## Trigger

Invoke when the user asks for: `/sdd-plan`, `create plan`, `execution plan`.

## Outcome

A **PLAN** in **pt-BR** at a **canonical** path under `features/NNN-slug/USnn/PLAN/PLAN_NNN_*.md` (same story as the PRD; global under `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/sdd/<repo-id>/features/...`). Root/flat `PLAN/` is **not** a valid Classic SDD path. Same `NNN` as PRD. Each step = one `sdd-develop` session. Paths and test names in **English**; no code blocks.

**PLAN magro:** do not paste SQL/DDL/JSON/OpenAPI into the PLAN. Refuse to omit those bodies from PLAN **unless** the canonical path already exists (bank phase 2 `database-schema.md` / `api-contracts.md` / `component-catalog.md`, or story `ARCH/` / `ANALYSIS/`). If missing, O1/O2 must create the canonical file first; PLAN only **cites the path**.

## Lazy-load (only when needed)

| When | Path |
|------|------|
| Pipeline guards, missing PRD dialog | `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/plugin/skills/_shared/sdd-artifacts/PIPELINE.md` |
| Storage, manifest, `.gitignore` | `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/plugin/skills/_shared/sdd-artifacts/STORAGE.md` |
| Caveman Mode (if active) | `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/plugin/skills/_shared/caveman/CAVEMAN.md` - **Lite cap** |
| SDD language, context, .NET | `sdd-artifact-language-pt-br.mdc`, `context-management.mdc`, `dotnet-guidelines/*.md` |

## Process

### Step -1b - Caveman Mode (Lite cap)
1. Read `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/sdd/preferences.json` (create `{ "caveman_mode": false, "caveman_level": "full" }` if missing).
2. If `caveman_mode` is false: continue without compression.
3. If true: load `E:/Source/Repos/agent-dev-toolkit/scripts/validation/fixtures/codex/plugin/skills/_shared/caveman/CAVEMAN.md`; apply **Lite** participation cap + prefs `caveman_level` (Lite skills never escalate); show once: `[Caveman] Modo ativo (respostas compactas, level={effective}). Digite caveman off para desativar.`
4. Honor `caveman on|off|status|lite|full|ultra` (and `stop caveman` / `normal mode`) during the session.
5. Auto-Clarity + never-compress gates/drafts/paths per `CAVEMAN.md`.

### -1. Pipeline and mode

Load `STORAGE.md` and `PIPELINE.md`. Use `STORAGE.md` schema v2 and run the dynamic storage resolution algorithm with parameter `$Workflow = classic`. Resolve `storage_mode` and `path` for the active repository. If this is the first run for the repository, execute storage mode selection and persist it in `manifest.json`.
Phase A/B as for `sdd-spec`. No PRD authoring; no production/test code.

### 0. Workspace

Target repo. Read `AGENTS.md` / `README.md` if present.

### 1. Resolve PRD

Glob canonical PRDs under `features/**/PRD/` only (workspace + global feature root). Do **not** resolve or execute against root/flat `PRD/` or `docs/PRD/`.

| Situation | Action |
|-----------|--------|
| User gave canonical PRD path (must be `features/.../PRD/` or global `.../features/.../PRD/`) | `Read`; validate status **Pronto para planejamento** / **Ready for planning** |
| No canonical PRD | `PIPELINE.md` section `sdd-plan` without PRD - options 1 or 2; then collect text or file path |
| "Criar PRD" | Choice **1** -> hand off to `sdd-spec` inputs; do not write PLAN until PRD exists (unless user chose **2**) |
| Non-canonical `.md` (root `PRD/`, `docs/PRD/`, etc.) | Promote under `features/...` via `sdd-spec` or ask for a canonical feature path |
| PRD under feature story | Load Prior context siblings (`PIPELINE.md` § Feature / story siblings) |

Summarize PRD; ask to proceed.

### 2-4. Explore, technical questions (<=10), baby steps

Glob/Grep/Read. Steps ~20-45 min each. Doc-update steps: **sdd-develop** asks doc language.

### 5. Context checkpoint

`context-management.mdc`; PLAN draft in chat if >=40%.

### 5.5 PLAN storage

`STORAGE.md`; global PLAN if PRD is global; else manifest or prompt.

### 5.75 Confirm before write

`PIPELINE.md` section Confirm before write - `PLAN_NNN_*`, full path, PRD link, step count. **sim** required before `Write` in Agent.

### 6. Write PLAN (Agent + sim only)

1. Validate canonical PLAN path under same story as PRD (`features/.../PLAN/`); `NNN` **equals** PRD `NNN`. Do **not** write or update PLANs at repo-root `PLAN/`.
2. Repository mode: `.gitignore` per `STORAGE.md` (include `/features/`; keep `/PRD/` `/PLAN/` as safety net only; **do not** add `/memory-bank/` — commit bank when product knowledge; never commit secrets). Global mode: do **not** edit `.gitignore`.
3. Template `reference.md`; PRD header = full PRD path; steps **Pendente**; `0/N`.
4. **PLAN magro:** if the PLAN would omit SQL/DDL/JSON/OpenAPI, the canonical path (bank phase 2 or `ARCH/` / `ANALYSIS/`) **must already exist**; if missing, **STOP** — O1/O2 creates that file first; PLAN cites the path only.
5. Warn if overwriting PLAN with completed steps.

### 7. Validate with user

Present steps, deps, risks. Confirm first sdd-develop step.

## Must not

- Write PLAN in English by default; embed implementation code
- Omit SQL/DDL/JSON/OpenAPI from PLAN when no canonical path exists (bank phase 2 or `ARCH/` / `ANALYSIS/`) — O1/O2 must create that file first; PLAN then cites the path
- Paste SQL/DDL/JSON/OpenAPI into PLAN when a canonical path already exists (cite the path only — PLAN magro)
- Create or overwrite PRD; sdd-develop or commit here
- Write PLAN without canonical PRD (except explicit user choice **2** with specs)
- Skip confirm-before-write; claim PLAN saved without `Write`
- `NNN` mismatch vs PRD; new writes outside `features/.../PLAN/`

## Handoff

```
/sdd-develop - features/NNN-slug/US01/PLAN/PLAN_NNN_slug.md - Step 1
```

One session = one PLAN step.