Refactor documentation and diagrams for web/pipeline. (#272)

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com> for assistance with diagram creation and documentation prose updates.

.claude/skills/doc-drift-pipeline/SKILL.md

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+---
+name: doc-drift-pipeline
+description: Checks whether recent changes under tooling/pipeline/ have made docs/pipeline/ stale. Use when the user asks to check for doc drift on the pipeline, before committing changes to tooling/pipeline, or when asked "does this need a doc update" for the C++ seed-data pipeline.
+---
+
+# Doc Drift Check — Pipeline
+
+Given a diff scoped to `tooling/pipeline/` (uncommitted changes, a range of
+commits, or a specific PR), determine whether it invalidates any factual
+claim in `docs/pipeline/`.
+
+## Steps
+
+1. Run `git diff -- tooling/pipeline/` (or
+   `git diff <base>...<head> -- tooling/pipeline/` if a range is given) to
+   see what changed. If the diff also touches `web/**`, note that it's out of
+   scope here — use the `doc-drift-web` skill for that half.
+2. Based on which files changed, identify the relevant doc(s):
+   - `tooling/pipeline/src/**`, `includes/**` (implemented behavior) →
+     `docs/pipeline/README.md`, `docs/pipeline/diagrams/current/*.mmd`
+     (activity, class)
+   - Work that's scaffolded/flagged but not wired into the default run path
+     (roadmap-only) → `docs/pipeline/ROADMAP.md`,
+     `docs/pipeline/diagrams/planned/*.mmd` — do not touch `current/` for
+     planned work that hasn't landed
+   - Changes to pipeline bias/hallucination handling, model prompts, sampling
+     logic, or known-limitation workarounds →
+     `docs/pipeline/ETHICS-AND-KNOWN-ISSUES.md`
+   - `tooling/pipeline/runpod/Dockerfile`, build/run scripts →
+     `docs/pipeline/README.md` (setup/usage sections)
+   - `docs/pipeline/french-cities.example` — check it still matches the input
+     schema the pipeline actually reads
+   - A new file added under `docs/pipeline/**` → also check `docs/index.md`
+     and `mkdocs.yml` nav are updated to reference it
+3. Read the relevant doc section(s) and check each specific factual claim
+   (tables, "currently X", "not yet implemented", roadmap checkboxes) against
+   the diff. For diagrams, this means reading the `.mmd` source (not just the
+   wrapping `.md`) and checking nodes/edges/labels against the diff — a
+   pipeline stage or control-flow change can invalidate a diagram without
+   touching any prose.
+4. When a diff adds real behavior that was previously only in
+   `diagrams/planned/`, check whether that planned diagram/roadmap entry
+   should now move to `current/`/README rather than just adding a duplicate
+   claim in both places.
+5. Report only what's actually stale — do not rewrite unrelated prose, do not
+   invent claims not grounded in the diff.
+6. If nothing is affected, say so plainly and make no edits.
+7. For confirmed drift, propose the exact edit (old text → new text, or the
+   changed `.mmd` node/edge) rather than committing directly, unless
+   explicitly told to apply it. Flag `.mmd` changes separately since they may
+   need a re-render (`docs/rendered-diagrams/pipeline/**`) via
+   `docs/makefile`.

.claude/skills/doc-drift-web/SKILL.md

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+---
+name: doc-drift-web
+description: Checks whether recent changes under web/ have made docs/web/ stale. Use when the user asks to check for doc drift on the web app, before committing changes to web/backend or web/frontend, or when asked "does this need a doc update" for web/API/frontend work.
+---
+
+# Doc Drift Check — Web
+
+Given a diff scoped to `web/` (uncommitted changes, a range of commits, or a
+specific PR), determine whether it invalidates any factual claim in
+`docs/web/`.
+
+## Steps
+
+1. Run `git diff -- web/` (or `git diff <base>...<head> -- web/` if a range is
+   given) to see what changed. If the diff also touches `tooling/pipeline/**`,
+   note that it's out of scope here — use the `doc-drift-pipeline` skill for
+   that half.
+2. Based on which files changed, identify the relevant doc(s):
+   - `web/backend/API/**`, `Features.*/**` (general) → `docs/web/architecture.md`
+   - `web/backend/Features/Features.Users/**/Authentication/**`,
+     identity/token code (`ITokenService`, `RefreshToken*`, `ConfirmEmail*`,
+     login/registration handlers) → `docs/web/token-validation.md`,
+     `docs/web/diagrams/auth/*.mmd` (pick the matching flow: login,
+     registration, refresh-token, confirm-user, delete-account,
+     update-email/password/profile/username, resend-confirmation,
+     error-handling)
+   - `web/backend/Database/**` (entities, `Database.Migrations/scripts/**`) →
+     `docs/web/database.md`, `docs/web/diagrams/database-schema/*.mmd` (pick
+     the matching schema: beer, brewery, identity, location, media)
+   - Host wiring / DI registration (`API/**Program.cs`,
+     `Database.Seed/**Program.cs`) → `docs/web/diagrams/vertical-slice/host-wiring.mmd`
+   - New project references between `Features.*`/`Shared.*`/`Domain.*`
+     projects (new `.csproj` `<ProjectReference>`) →
+     `docs/web/diagrams/vertical-slice/project-references.mmd`
+   - `web/backend/Dockerfile*`, `web/frontend/Dockerfile*`, compose/deploy
+     config → `docs/web/docker.md`, `docs/web/diagrams/deployment/*.mmd`
+     (dev, test, minimal, db-only, prod), `docs/web/diagrams/deployment.md`
+   - `web/.env.example`, `web/.env.test`, appsettings → `docs/web/environment-variables.md`
+   - `web/backend/API/API.Specs/**`, test infra/fixtures → `docs/web/testing.md`
+   - New backend project setup, dev tooling → `docs/web/getting-started.md`
+   - `web/frontend/**` → `docs/web/architecture.md` (Frontend architecture section)
+   - A new file added under `docs/web/**` → also check `docs/index.md` and
+     `mkdocs.yml` nav are updated to reference it
+3. Read the relevant doc section(s) and check each specific factual claim
+   (tables, "currently X", "not yet implemented", roadmap checkboxes) against
+   the diff. For diagrams, this means reading the `.mmd` source (not just the
+   wrapping `.md`) and checking nodes/edges/labels against the diff — a
+   schema or flow change can invalidate a diagram without touching any prose.
+4. Report only what's actually stale — do not rewrite unrelated prose, do not
+   invent claims not grounded in the diff.
+5. If nothing is affected, say so plainly and make no edits.
+6. For confirmed drift, propose the exact edit (old text → new text, or the
+   changed `.mmd` node/edge) rather than committing directly, unless
+   explicitly told to apply it. Flag `.mmd` changes separately since they may
+   need a re-render (`docs/rendered-diagrams/web/**`) via `docs/makefile`.