Add portability retrofit: AGENTS.md + CLAUDE.md symlink, scoring-brain guide, ROADMAP, .env.example

ROADMAP.md

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+# Ten31 Signal Engine — ROADMAP
+
+Longer-term backlog (the near-term snapshot lives in `AGENTS.md` → Current state). Rationale and the
+falsification hypotheses (H1–H6) are in `DESIGN_v2.md`.
+
+## Scoring brain — the real validation
+- **Frontier-fan-out test (H6) — the untested half, = the actual §1.1 miss.** Seed a 2023 conviction,
+  give the model 2023-ONLY context, let it PROPOSE the derivatives, then score that tree's precision/
+  recall against what actually repriced. The §7.1 backtest hand-wrote the tree (hindsight leakage); this
+  is the part that matters and isn't tested yet.
+- **Estimator rework (H4).** Replace the fragile 2nd-derivative *acceleration* with a persistence /
+  level-crossing test on the corroboration arrival rate, with per-source-type window cadence.
+- **Build the real resolver.** `signals/resolver.py` is a stub. Settle the lead-time-vs-actual-repricing
+  debate empirically against structured outcomes (price, FERC interconnection queue, PPAs, capex, policy).
+- **Extend claim-type weighting to the §7.1 power-infra tree** (it currently only gates the bitcoin
+  adversarial cases; descriptive-deployed > predictive-intent should apply everywhere).
+- **Job A scorers** (emergence / stance / intersection) for the forward Discovery pilot.
+- **MD&A targeting** for filings — extract Item 7, not front-matter boilerplate.
+
+## Corpus & independence
+- **Confirm materiality** of the remaining `own_network`-flagged sources with Grant: Unchained, Debifi,
+  Coinkite (Bitcoin.Review). Immaterial → flip to independent (the River/Swan precedent).
+- **BTC Sessions (Ben Perrin)** — strongest still-missing independent high-Strike merchant/wallet-adoption
+  show; resolve feed + ingest (a task chip exists for it).
+- **River image-PDF reports** — the 2022 Lightning report + 2025/2026 adoption reports have no text layer;
+  add an OCR / page-rasterization+vision path to ingest them.
+- Broad, **lineage-aware** corpus expansion toward independent vantage points (not more correlated
+  sell-side / trade-press voices).
+
+## Infrastructure & ops
+- **Add an automated test suite** (none today) — start with the scoring primitives (EISC, two_sided,
+  as-of harness) and the queue.
+- **Episode-pipelining** in `transcribe_worker` — download/chunk the next episode while transcribing the
+  current one, to close the inter-episode GPU idle gap (the per-chunk 2-in-flight path is already done).
+- **Corpus-management UI** — add to the corpus over time and see the full corpus selection.
+- **Forward live operation** — the only real test: scoring un-pre-selected signals as they arrive, with
+  the dual-evaluation ledger as arbiter.
+
+## Packaging / deploy
+- **Start9 `s9pk` packaging.** Build with `make x86` then `make install` → `immense-voyage.local`.
+  Bump the package version in the manifest BEFORE building (Start9 0.4.x won't recognize an un-bumped
+  rebuild). See the placement standard for infra conventions.