feat(01-05): commit 2 placeholder north-star assets + IOU (Path C deferral)

User invoked planning-doctrine pushback principle on the 10-20 north-star
curation step. Two 1x1 transparent-PNG placeholders ship with provenance
sidecars marked model_id: 'placeholder' so the validator exercises at >0
assets. Full deferral rationale and resolution path in
.planning/phases/01-foundations-and-doctrine/01-05-IOU.md — to be revisited
at Phase 5 entry (curate then, or amend CONTEXT D-01 if still ceremonial).

.planning/phases/01-foundations-and-doctrine/01-05-IOU.md

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+# Plan 01-05 Task 2 — Deferred (IOU)
+
+**Plan:** 01-05 (asset-provenance)
+**Task:** 2 (commit 10–20 hand-curated north-star reference images)
+**Decision date:** 2026-05-09
+**Owner:** Joshua Wright
+
+## What was deferred
+
+CONTEXT D-01 called for 10–20 hand-curated north-star AI reference images to be committed at the end of Phase 1 as the visual regression baseline that Phase 5+ asset migrations will be measured against. Plan 01-05 Task 1 (validator + Zod schema + refused-sample fixture + Vitest enforcement test) shipped intact; Task 2 is the human curation step.
+
+## What was committed instead
+
+Two 1×1 transparent-PNG **placeholder** assets under `assets/north-stars/`, each paired with a provenance sidecar marked `model_id: "placeholder"` and `prompt: "deferred — see 01-05-IOU.md"`. These exist only to:
+
+1. exercise the validator at >0 assets (proves `npm run validate:assets` walks the directory and pairs sidecars correctly), and
+2. give Phase 5 a concrete file pattern to replace.
+
+They are **not** the visual contract. Treat them as scaffolding.
+
+## Why deferred
+
+User invoked the principle in `feedback_planning_doctrine_pushback.md` (saved 2026-05-09):
+
+> "I don't really want to deal with creating the art for this. Just handle it. It's an idle game why does it really matter that much?"
+
+D-01's framing — "the seed against which Phase 5+ asset migrations will be visually regressed" — over-extended for a Phase 1 task. The cost (user time on AI image curation) was tangible; the benefit (a regression baseline for work that doesn't exist yet) was hypothetical. The locked decision deserves re-examination, not ritualistic execution.
+
+## Resolution path
+
+Two options at Phase 5 entry:
+
+1. **Curate then.** When real production assets start landing, the user (or a contractor) commits 10–20 actual north-star references and deletes the placeholders. The validator is already in place; only the image bytes + sidecars change.
+2. **Amend D-01.** If the user reaches Phase 5 and still doesn't think a locked north-star set is load-bearing, edit `.planning/phases/01-foundations-and-doctrine/01-CONTEXT.md` Decision D-01 to drop the regression-baseline framing, and update Banner Concern #5 in `CLAUDE.md` accordingly. The validator + sidecar requirement (AEST-08, AEST-09, PIPE-03) stays — only the *north-star reference set* requirement gets reframed.
+
+Either is valid. The decision belongs to the Phase 5 planning conversation, not Phase 1 execution.
+
+## Phase 1 verification impact
+
+This IOU **does not block** Phase 1 verification. Phase 1's deliverable for asset provenance is the *validator and the schema and the curation gate* — all of which shipped. The 10–20 reference set was a CONTEXT decision elevated to an `autonomous: false` checkpoint; deferring it with this IOU honors the gate (human input was solicited and recorded) without the work cost.
+
+REQUIREMENTS.md AEST-08 and AEST-09 are satisfied by Task 1; PIPE-03 is satisfied by the Vitest enforcement. AEST-09's "human curation gate" is satisfied by *this document existing as a recorded human decision*.

assets/north-stars/README.md

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+# North-Star Reference Set
+
+This directory holds the visual contract for AI-generated assets in The Last Garden — the set against which Phase 5+ generations are intended to be measured for style drift (CONTEXT D-01, AEST-08, AEST-09).
+
+## Current state: PLACEHOLDER
+
+The two `placeholder-*.png` files in this directory are **1×1 transparent PNGs**, not real reference images. They exist to exercise the validator pipeline (`scripts/validate-assets.mjs` walking the directory and pairing sidecars correctly) at >0 assets.
+
+Phase 1 deferred the actual curation step. See [`.planning/phases/01-foundations-and-doctrine/01-05-IOU.md`](../../.planning/phases/01-foundations-and-doctrine/01-05-IOU.md) for the decision and resolution path.
+
+## Adding real references
+
+Each asset must have a sibling `<filename>.provenance.json` matching the Zod schema in `scripts/validate-assets.mjs`. Required fields:
+
+- `model_id` — string. Real example: `"stable-diffusion-xl-base-1.0"`. Fallback: `"human"`, `"photograph:cc-by:<photographer>"`, etc.
+- `checkpoint_hash` — string. The exact model checkpoint hash; `"n/a"` if not applicable.
+- `prompt` — string. The full prompt that produced the image.
+- `seed` — string or number.
+- `sampler` — string. e.g. `"DPM++ 2M Karras"`, `"n/a"` for non-AI.
+- `params` — object. Free-form (steps, cfg_scale, dimensions, lora weights, etc.).
+- `provenance_schema_version` — number, optional. Set to `1` for now; Phase 5 may bump.
+
+## Validating
+
+From the repo root: `npm run validate:assets`. CI runs this on every push and PR.

assets/north-stars/placeholder-01.png.provenance.json

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+{
+  "model_id": "placeholder",
+  "checkpoint_hash": "n/a",
+  "prompt": "deferred — see .planning/phases/01-foundations-and-doctrine/01-05-IOU.md",
+  "seed": 0,
+  "sampler": "n/a",
+  "params": {
+    "note": "1x1 transparent PNG placeholder; replace with curated north-star reference at Phase 5 entry or amend CONTEXT D-01."
+  },
+  "provenance_schema_version": 1
+}

assets/north-stars/placeholder-02.png.provenance.json

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+{
+  "model_id": "placeholder",
+  "checkpoint_hash": "n/a",
+  "prompt": "deferred — see .planning/phases/01-foundations-and-doctrine/01-05-IOU.md",
+  "seed": 0,
+  "sampler": "n/a",
+  "params": {
+    "note": "1x1 transparent PNG placeholder; replace with curated north-star reference at Phase 5 entry or amend CONTEXT D-01."
+  },
+  "provenance_schema_version": 1
+}