diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5e625cd84..49c0b8ce3 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -34,16 +34,18 @@ Open `http://localhost:4173`. Before sending a PR run `npm run build`, `npm test
 - **`npm run test:track`** — the 3D flight-tracking regression harness. It
   drives the **real app** in headless Chromium, so it **requires a running
   dev server** (default `http://localhost:4173`). To target another instance,
-  run `npm run test:track -- --url <app-url>` (or `node scripts/track-regression.mjs --url <app-url>`).
-  depend on live OpenSky / adsb.lol / AISStream (those are optional or
-  rate-limited locally); it installs a persistent `fetch` shim that returns
-  synthetic aircraft in the exact upstream payload shapes the layers parse.
+  run `npm run test:track -- --url <app-url>` (or
+  `node scripts/track-regression.mjs --url <app-url>`). It does not depend on
+  live OpenSky / adsb.lol / AISStream (those are optional or rate-limited
+  locally); it installs a persistent `fetch` shim that returns synthetic
+  aircraft in the exact upstream payload shapes the layers parse.
 - **`npm run build`** — production Vite build. No server or credentials
   required; it validates that the client bundle compiles cleanly.
 
-If you change runtime behavior, update `docs/CURRENT-STATE.md` and
-`CHANGELOG.md` in the same PR. For a deeper catalog of what each harness
-checks and what it needs to run, see [TESTING.md](TESTING.md).
+Each feature also has its own headless gate; see
+[Feature regression gates](#feature-regression-gates) below. Docs and changelog
+rules are under [Pull requests](#pull-requests).
+
 ## Checking a built app locally
 
 Run `npm run build` followed by `npm run preview`. Preview serves the built
diff --git a/DATA_SOURCES.md b/DATA_SOURCES.md
index 0ae94b746..403972d5e 100644
--- a/DATA_SOURCES.md
+++ b/DATA_SOURCES.md
@@ -304,35 +304,14 @@ the retrieval date (2026-07-30), exact download URL, license evidence, and the
 deterministic transform (`scripts/build-sf-neighborhoods.mjs`: `nhood` → `name`, ~2 m
 Douglas-Peucker simplification, 6-decimal rounding).
 
-### Pilot CCTV source packs (`config/`)
+### Local CCTV source packs (`config/`)
 
-`config/cctv_sources.shinjuku.json` is a **demo source pack** (3 cameras:
-Shinjuku Crossing, Shinjuku Station West, Shibuya Scramble) used for
-projection-pipeline testing. The feeds are Google-hosted sample MP4 videos
-(`storage.googleapis.com/gtv-videos-bucket/sample/`), not live public cameras.
-Camera poses (coordinates, heading, pitch, FOV, mount height) are fabricated
-priors placed at recognizable Tokyo intersections.
-
-Use the pack by setting:
-
-```bash
-CCTV_SOURCES_FILE=config/cctv_sources.shinjuku.json npm run dev
-```
-
-Or equivalently, via `./scripts/dev-cctv.sh`:
-
-```bash
-CCTV_SOURCES_FILE=config/cctv_sources.shinjuku.json ./scripts/dev-cctv.sh
-```
-
-The pack exercises the same CCTV registration and frustum-projection pipeline
-as live city packs without requiring network access to a camera catalog. It is
-**not** a live data source and carries no external attribution requirement. The
-sample videos are publicly available Google test media.
-
-`config/cctv_sources.austin.json` is the reference live pack. Custom source
-packs follow the same JSON schema (see either file); `CCTV_SOURCES_JSON`
-accepts inline JSON as an alternative to a file path.
+The server can read a local camera list from `CCTV_SOURCES_FILE` (default
+`config/cctv_sources.austin.json`, which ships empty) and inline JSON from
+`CCTV_SOURCES_JSON`; the two are merged, and inline entries win on a duplicate
+id. A non-empty local pack replaces the live open-data camera packs unless
+`CCTV_FORCE_AUSTIN=1` is set. The packs under `config/` show the schema, and a
+pack's cameras keep their own source's license and attribution.
 
 ---
 
diff --git a/changelog.d/210-contributor-docs-refresh.md b/changelog.d/210-contributor-docs-refresh.md
new file mode 100644
index 000000000..ed6dbe354
--- /dev/null
+++ b/changelog.d/210-contributor-docs-refresh.md
@@ -0,0 +1,4 @@
+- Contributor docs: CONTRIBUTING lists what each of the three baseline checks
+  needs to run, DATA_SOURCES documents loading a local CCTV source pack, and
+  KNOWN-ISSUES points the floor-placement note at its verification script
+  instead of a missing report (Gaurav Patidar, @gaurav7902, #210).