Fase A identity on PCB HEAD: operator fence, keep BOM/SPOF/EMI.

Replace Faradworks Inc. TOS/privacy/contact/metadata with Michele Bigi.
Dual-read pinscope_* keys; write periscope_* only. AGPL LICENSE and
GitHub fork parent unchanged. validate.py not edited.

docs/development/PINSCOPE_FENCE.md

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+# Recinto PinScope (Fase A)
+
+Documented fence. **No file moves.** `LICENSE` AGPL-3.0 is unchanged. The GitHub fork `manvalan/periscope` → `Faradworks/Pinscope` is **not** detached.
+
+## Branch topology
+
+| Ref | Role |
+| --- | --- |
+| `origin/main` | Archival: upstream Pinscope + Docker/OSS (+3). Not the live product. |
+| `cursor/pcb-review-plan-44dd` | Live product (schema, PCB exam, finding engine). **PCB workers stay here.** |
+| `cursor/pinscope-fase-a-identity` | Fase A identity + compat fence only. Do not land engine/PCB rewrites on this branch. |
+
+Merging product onto `main` is a later process step, still without detaching the fork.
+
+## Inherited tree (KEEP behind the fence)
+
+Treat as in-tree PinScope, not as “native Periscope”:
+
+- `backend/periscopex/{graph,models,parsers*,validate,validation_tools,resolve_passives,derating,bom_summary,taxonomy,pin_mux_check,led_current_check,pin_function_tokens}`
+- `backend/services/pipeline.py`, `pipeline_worker.py`, `validation.py`, `extraction.py` (DIRECT)
+- `skills/`, `scripts/upload_skills.py`
+- Open-core Clerk/billing stubs
+- `simple_project/` fixtures, `docs/how-it-works.svg`
+
+Native Periscope (do not fold into the fence): `finding_engine.py`, PCB/placement/antenna jobs, DeepSeek providers, local JWT, this identity layer.
+
+## Write vs read (identifiers)
+
+| Write (native) | Read-only / migrate |
+| --- | --- |
+| `periscope_token` | `pinscope_token` |
+| `periscopex:*` localStorage | `pinscopex:*` |
+| JWT `iss=periscope-local` | also accept `pinscope-local` |
+| `periscope_version` in `project.json` | also accept `pinscope_version` |
+
+Code: `frontend/src/lib/pinscope-compat.ts`, `backend/pinscope_compat.py`.
+
+**Do not rename** live Docker networks `pinscope_pinscope` / `pinscope_periscope` in Fase A (VPS Caddy).
+
+## Identity
+
+Operator of https://periscope.michelebigi.it is **Michele Bigi**. UI, TOS, privacy, metadata, and contact must not say the operator is Faradworks, Inc. Attribution to Faradworks/Pinscope remains for AGPL lineage only.
+
+## Out of scope here (later phases)
+
+Clerk/Anthropic runtime isolation (B). Rewrite of `validate.py` / finding engine (C). UI FindingCard (D). Parsers/graph (E). Fork detach (legal, not this plan).