Semion hero/OG rasters + Aaron train handoff docs

README.md

@@ -1,7 +1,7 @@
 # Semion
 
 <p align="center">
-  <img src="assets/hero.svg" alt="Semion hero — bronze triad of icon, index, symbol" width="100%" />
+  <img src="assets/hero.png" alt="Semion hero — bronze triad of icon, index, symbol" width="100%" />
 </p>
 
 **Triad specialist** for the Abraxas model stack. Corpus atoms in. `semion.frame.v0` out.
@@ -22,14 +22,17 @@ The Validate badge may stay red when Actions billing blocks the workflow even if
 
 ## Social preview
 
-GitHub / link-preview card: [`assets/og-social.svg`](assets/og-social.svg) (1280×640). Distinct from the README hero.
-Raster stills for Settings → Social preview live at `assets/og-social.jpg` once dropped (see `assets/README.md`).
+Raster card for GitHub Settings → Social preview: [`assets/og-social.jpg`](assets/og-social.jpg) (1280×640). Also [`assets/og-social.png`](assets/og-social.png).
+SVG stand-in remains at [`assets/og-social.svg`](assets/og-social.svg).
+
+Custom Settings social preview is **not** writable via API or the GitHub MCP connector. After merge, paste `assets/og-social.jpg` in Settings → General → Social preview (private repos may require a prior upload or public visibility for sharing).
 
 ## Quick links
 
 | Doc | Path |
 |-----|------|
 | Status | [`STATUS.md`](STATUS.md) |
+| Aaron train handoff | [`docs/aaron-train-handoff.md`](docs/aaron-train-handoff.md) |
 | Milestones | [`specs/MILESTONES.md`](specs/MILESTONES.md) |
 | Constitution | [`.specify/memory/constitution.md`](.specify/memory/constitution.md) |
 | Spec 000 spine | [`specs/000-semion-spine/spec.md`](specs/000-semion-spine/spec.md) |

STATUS.md

@@ -12,5 +12,11 @@
 | Spec 003 semiosis chain | specified + export `compat.py` |
 | Spec 004 encoder gate | specified, name_gate **false**, dataset note landed |
 | E-S0 / E-C0 / E-K0 | in repo |
-| Hub | closed |
+| Hub | closed (HF skipped 2026-09-11) |
 | Spec 009 id swap | done — `semion.triad` |
+| Hero / OG rasters | on branch — `assets/hero.{png,jpg}` · `assets/og-social.{png,jpg}` |
+| Settings Social preview | **manual paste** of `og-social.jpg` (no API/MCP write) |
+| M2 rebalance pack | floors **PASS** — gold 482 (train 330 / val 50 / test 102); keep_weak 150 |
+| Aaron Notion pack | https://app.notion.com/p/3d83e8ba2f5c81608499deffc060160d |
+| Boof ALLOW_TRAIN | **false** — Aaron trains on Spark |
+| Handoff doc | [`docs/aaron-train-handoff.md`](docs/aaron-train-handoff.md) |

assets/README.md

@@ -2,9 +2,11 @@
 
 | File | Use |
 |---|---|
-| `hero.svg` | README banner |
-| `og-social.svg` | 1280×640 link preview stand-in |
-| `hero.jpg` | optional raster drop-in (generate locally; not required for specify) |
-| `og-social.jpg` | paste into GitHub Settings → General → Social preview |
+| `hero.svg` | README banner (vector) |
+| `hero.png` / `hero.jpg` | README hero raster (1600×900) |
+| `og-social.svg` | 1280×640 link-preview stand-in |
+| `og-social.png` / `og-social.jpg` | Settings → General → Social preview (1280×640) |
 
-GitHub social preview API is not writable from this lane. Operator pastes `og-social.jpg` in the repo settings UI.
+GitHub social preview **API is not writable** (REST/GraphQL/MCP). Operator pastes `og-social.jpg` in the repo Settings UI after merge.
+
+Semion is private; GitHub only allows custom OG upload on public repos, or private repos that already have a custom image.

docs/aaron-train-handoff.md

@@ -0,0 +1,39 @@
+# Aaron train handoff — Semion M2 rebalance
+
+**Audience:** Aaron Godbout (Spark)  
+**Date:** 2026-09-11 PT  
+**Repo pin:** `scrimshawlife-ctrl/Semion@9e29976` (docs tip of this branch may be newer)
+
+## Pack
+
+- Notion: https://app.notion.com/p/3d83e8ba2f5c81608499deffc060160d
+- Pack id: `semion-train-pack-m2-rebalance-20260911`
+- SHA256: `8bb18b705b1e51cbce63b4fec79029c00b5f2b81e0b11ca9d42533057851b0da`
+- Spec 011: https://app.notion.com/p/3d83e8ba2f5c813c9989c0a2dc28357f
+
+## Counts (Spec 004 floors PASS)
+
+| Split | N |
+|---|---|
+| train | 330 |
+| val | 50 |
+| test | 102 |
+| keep_weak (not gold) | 150 |
+
+Gold pool 482: OBSERVED 14 · inferred wrap 240 · inferred seed 228.  
+Class floors PASS (icon/index/symbol ≥15%; mixed/NC ≥8%). Train symbol share ~0.31.
+
+## How to train
+
+1. Download the zip from Notion.
+2. Prefer `gold_observed.jsonl` for T0/T1 gold; full splits in `train.jsonl` / `val.jsonl` / `test.jsonl`.
+3. Keep `keep_weak.jsonl` out of gold unless you set an explicit weak-lane flag.
+4. Dual-use / `NOT_COMPUTABLE` rows are refuse probes — expect refuse, not action content.
+5. Encoder gate: `specs/004-encoder-gate/`. `name_gate` stays **false** until your eval is green.
+6. HF Hub skipped (Danny). Boof `ALLOW_TRAIN` is false — run train on Spark.
+
+## Do not
+
+- Mix `keep_weak` into gold without a weak-lane flag
+- Treat Notion/email as a green name-gate
+- Publish to Hugging Face without Danny `ALLOW_HUB`