# PO Validation Decision — STORY-026

**Date**: 2026-05-05
**Actor**: Product Owner
**Transition**: Business Review → Done

## Context

STORY-026 implementa un header de sesión con metadatos que se emite al iniciar el daemon. Muestra versión, timestamp UTC, proyecto, provider, modelos por rol, límites, estado de git, y hooks configurados. Forma parte de EPIC-09 (CLI y Visibilidad de Sesión).

## Evidence Reviewed

| Check | Result |
|---|---|
| `cargo build` | Clean |
| `cargo test` | 400 passed, 0 failed, 1 ignored |
| `cargo test story026` | 31 passed (detailed + compact + edge cases) |
| `cargo test --test architecture` | 11 passed |
| `cargo clippy -- -D warnings` | Clean |
| `cargo fmt -- --check` | Clean |
| `regista validate --json` | 6 OK, 0 errors, 0 warnings |
| `regista run --dry-run` | Pipeline reconoce STORY-026 en Business Review → Done |

## Acceptance Criteria

All 9 CAs satisfied:
- CA1 ✅ Detailed block header with full metadata
- CA2 ✅ Compact mode (single line)
- CA3 ✅ Models resolved via `AgentsConfig::model_for_role()`
- CA4 ✅ Effective limits with auto-scaling
- CA5 ✅ Git status (habilitado/deshabilitado)
- CA6 ✅ Hooks listing (active or "ninguno")
- CA7 ✅ Emission via `tracing::info!`
- CA8 ✅ Build clean
- CA9 ✅ All tests pass

## Minor Observation

The `--compact` CLI flag is implemented in `format_session_header()` and covered by 31 tests, but is not exposed as a CLI argument (`emit_session_header` is always called with `compact: false`). This does not block delivery — the code is ready, only needs wiring in `args.rs` (≈2 lines).

## Decision

**Done** — the story delivers the promised business value. The session header provides operational transparency essential for traceability and debugging. Implementation is clean, well-tested, and follows project conventions.

## Pipeline History

PO(refine) → QA(tests) → Dev(implement) → QA(fix tests) → Dev(review) → Reviewer(DoD) → PO(validate) → Done
