> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase31-session05-pages-build-and-deployment-scaffold` **Started**: 2026-06-24 13:17 **Last Updated**: 2026-06-24 13:32

***

## Session Progress

| Metric              | Value   |
| ------------------- | ------- |
| Tasks Completed     | 16 / 16 |
| Estimated Remaining | 0 hours |
| Blockers            | 0       |

***

## Task Log

### 2026-06-24 - Session Start

**Environment verified**:

* [x] Prerequisites confirmed
* [x] Tools available
* [x] Directory structure ready

**Notes**:

* `check-prereqs.sh --json --env` passed.
* `check-prereqs.sh --json --tools "bun,vite,wrangler"` reported no global `vite` command, but the repository-local Vite binary is available through `node_modules/.bin/vite` and `bun run --silent vite --version`.

***

### Task T001 - Verify prerequisites and existing demo-pages output shape

**Started**: 2026-06-24 13:17 **Completed**: 2026-06-24 13:17 **Duration**: 1 minute

**Notes**:

* Verified the Phase 31 Session 05 source plan and active spec agree on a Pages assembly task rather than route behavior work.
* Confirmed existing generated output is not Pages-rooted yet: `demo-website/dist/client/index.html` exists, `demo-website/dist/index.html` is absent, and `demo-website/dist/server` exists.
* Confirmed `demo-website/dist/` is ignored generated output.

**Files Changed**:

* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - initialized session progress and recorded T001 evidence.

**Verification**:

* Command/check: `if [ -d ".spec_system/scripts" ]; then bash .spec_system/scripts/analyze-project.sh --json; else bash /home/aiwithapex/.codex/plugins/cache/apex-spec-system/apex-spec/2.1.3-codex/scripts/analyze-project.sh --json; fi`
  * Result: PASS - active session resolved.
  * Evidence: `current_session` was `phase31-session05-pages-build-and-deployment-scaffold`; session directory contained `spec.md` and `tasks.md`.
* Command/check: `if [ -d ".spec_system/scripts" ]; then bash .spec_system/scripts/check-prereqs.sh --json --env; else bash /home/aiwithapex/.codex/plugins/cache/apex-spec-system/apex-spec/2.1.3-codex/scripts/check-prereqs.sh --json --env; fi`
  * Result: PASS - environment prerequisites available.
  * Evidence: overall status `pass`; `.spec_system`, `jq`, and `git` passed.
* Command/check: `test -f demo-website/dist/client/index.html && test ! -f demo-website/dist/index.html && test -d demo-website/dist/server && git check-ignore -q demo-website/dist/client/index.html && printf 'dist shape ok: client index present, root index absent, server output present, dist ignored\n'`
  * Result: PASS - current output shape matches the documented gap.
  * Evidence: command printed `dist shape ok: client index present, root index absent, server output present, dist ignored`.
* UI product-surface check: N/A - setup verification only.
* UI craft check: N/A - no UI changed.

***

### Task T015 - Run Pages build and verify output shape

**Started**: 2026-06-24 13:30 **Completed**: 2026-06-24 13:31 **Duration**: 1 minute

**Notes**:

* First `bun run demo:build:pages` attempt failed while loading `vite.config.ts` because config-loaded `src/extensions/trend-finder/source-setup.ts` imported `@/lib/public-demo` before Vite aliases were active.
* Fixed the build-path import by changing that config-loaded source module to a relative import.
* Re-ran `bun run demo:build:pages`; Vite client build, SSR build, prerender, and Pages dist assembly completed successfully.
* Verified the final Pages root contains top-level `index.html`, `_redirects`, `_headers`, and committed `/demo/*` fixtures, with `client` and `server` pruned.

**Files Changed**:

* `src/extensions/trend-finder/source-setup.ts` - replaced one config-loaded app alias import with a relative import so Vite config bundling can resolve it.
* `demo-website/dist` - generated ignored Pages output rebuilt and assembled locally; not tracked by Git.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T015 evidence.

**Verification**:

* Command/check: `bun run demo:build:pages`
  * Result: PASS after scoped import fix.
  * Evidence: command completed Vite client build, SSR build, prerendered `/`, and printed `Pages demo dist assembled`, `Files: 199`, `Promoted client files: 192`, `Copied public files: 7`, and `Pruned directories: client, server`.
* Command/check: `test -f demo-website/dist/index.html && test -f demo-website/dist/_redirects && test -f demo-website/dist/_headers && test -f demo-website/dist/demo/live-data.snapshot.json && test -f demo-website/dist/demo/snapshot-metadata.json && test -f demo-website/dist/demo/graphs/index.json && test -f demo-website/dist/demo/graphs/ai-os.json && test ! -d demo-website/dist/client && test ! -d demo-website/dist/server && printf 'pages build output ok: required files present and generated-only trees pruned\n'`
  * Result: PASS - final Pages output shape is correct.
  * Evidence: command printed `pages build output ok: required files present and generated-only trees pruned`.
* Command/check: `git diff -- wrangler.jsonc package.json src/extensions/trend-finder/source-setup.ts | sed -n '1,220p'`
  * Result: PASS - root `wrangler.jsonc` remains unchanged; package diff only adds Pages scripts; source setup diff only changes import resolution.
  * Evidence: diff output showed changes in `package.json` and `src/extensions/trend-finder/source-setup.ts`; no `wrangler.jsonc` diff.
* Command/check: `git check-ignore -q demo-website/dist/index.html && printf 'dist ignored ok\n'`
  * Result: PASS - generated dist remains ignored.
  * Evidence: command printed `dist ignored ok`.
* UI product-surface check: N/A - build artifact verification only; no route UI changed.
* UI craft check: N/A - no UI changed.

**BQC Fixes**:

* Contract alignment: config-loaded source setup code now uses a relative import that resolves during Vite config bundling and app builds (`src/extensions/trend-finder/source-setup.ts`).

***

### Task T014 - Run focused unit and script type checks

**Started**: 2026-06-24 13:29 **Completed**: 2026-06-24 13:30 **Duration**: 1 minute

**Notes**:

* Ran the focused Pages demo build unit suite.
* Ran the script TypeScript typecheck for new script code.

**Files Changed**:

* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T014 evidence.

**Verification**:

* Command/check: `bun run test -- scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - focused unit suite passes.
  * Evidence: Vitest reported 1 test file passed and 7 tests passed.
* Command/check: `bun run typecheck:scripts`
  * Result: PASS - script TypeScript compilation check passed.
  * Evidence: `tsc --noEmit -p tsconfig.scripts.json` exited with code 0.
* UI product-surface check: N/A - automated script tests only.
* UI craft check: N/A - no UI changed.

***

### Task T013 - Verify assembly against existing ignored output

**Started**: 2026-06-24 13:28 **Completed**: 2026-06-24 13:29 **Duration**: 1 minute

**Notes**:

* Ran the assembly CLI against the existing ignored `demo-website/dist` output.
* Confirmed final output contains the required Pages root files and prunes generated-only `client` and `server` directories.
* Confirmed generated dist output remains ignored and uncommitted.

**Files Changed**:

* `demo-website/dist` - generated ignored output assembled locally; not tracked by Git.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T013 evidence.

**Verification**:

* Command/check: `bun run scripts/demo/assemble-pages-dist.ts --json`
  * Result: PASS - assembly completed against existing generated output.
  * Evidence: JSON output reported `ok: true`, `fileCount: 198`, `promotedClientFileCount: 191`, `copiedPublicFileCount: 7`, and pruned `client` and `server`.
* Command/check: `test -f demo-website/dist/index.html && test -f demo-website/dist/_redirects && test -f demo-website/dist/_headers && test -f demo-website/dist/demo/live-data.snapshot.json && test -f demo-website/dist/demo/snapshot-metadata.json && test -f demo-website/dist/demo/graphs/index.json && test ! -d demo-website/dist/client && test ! -d demo-website/dist/server && printf 'dist assembled ok: root files present, client/server pruned\n'`
  * Result: PASS - Pages output shape is correct after assembly.
  * Evidence: command printed `dist assembled ok: root files present, client/server pruned`.
* Command/check: `git check-ignore -q demo-website/dist/index.html && git status --short demo-website/dist && printf 'dist ignored ok\n'`
  * Result: PASS - generated dist remains ignored.
  * Evidence: command printed `dist ignored ok` with no tracked status output.
* UI product-surface check: N/A - generated build artifact shape only.
* UI craft check: N/A - no UI changed.

***

### Task T012 - Update Pages demo deployment documentation

**Started**: 2026-06-24 13:27 **Completed**: 2026-06-24 13:28 **Duration**: 1 minute

**Notes**:

* Documented Cloudflare Pages Git settings, including repo root, build command, output directory, production branch, and `BUN_VERSION=1.3.14`.
* Documented local static preview and direct upload with operator-supplied `<pages-project-name>`.
* Documented static-only v1 constraints and Worker deployment separation.

**Files Changed**:

* `demo-website/README.md` - added Pages build, preview, direct upload, Git settings, and deployment boundary documentation.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T012 evidence.

**Verification**:

* Command/check: `grep -n "Build command: bun run demo:build:pages\|Build output directory: demo-website/dist\|BUN_VERSION=1.3.14\|wrangler pages deploy demo-website/dist --project-name <pages-project-name> --branch main\|worker:deploy\|pages_build_output_dir\|static-only" demo-website/README.md`
  * Result: PASS - required Pages settings, direct upload command, and separation boundaries are documented.
  * Evidence: output listed the build command, output directory, `BUN_VERSION=1.3.14`, direct upload command, Worker separation, no root Pages output config, and static-only constraints.
* Command/check: `grep -E 'sk-[A-Za-z0-9_-]{12,}|Bearer [A-Za-z0-9._~+/=-]{8,}|CLOUDFLARE_API_TOKEN|OPENAI_API_KEY|ANTHROPIC_API_KEY' demo-website/README.md && exit 1 || printf 'README placeholders ok: no secret-like tokens\n'`
  * Result: PASS - docs use placeholders only.
  * Evidence: command printed `README placeholders ok: no secret-like tokens`.
* UI product-surface check: N/A - documentation only.
* UI craft check: N/A - no UI changed.

***

### Task T011 - Wire Pages build and preview scripts

**Started**: 2026-06-24 13:26 **Completed**: 2026-06-24 13:27 **Duration**: 1 minute

**Notes**:

* Added `demo:build:pages` to run Vite in public demo mode and then assemble the Pages-rooted static dist.
* Added `demo:preview:pages` to build and serve `demo-website/dist` with Wrangler Pages dev.
* Left `demo:snapshot`, `worker:preview`, and `worker:deploy` unchanged and unreferenced by the Pages build command.

**Files Changed**:

* `package.json` - added `demo:build:pages` and `demo:preview:pages` scripts.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T011 evidence.

**Verification**:

* Command/check: `jq -r '.scripts | {"demo:build:pages", "demo:preview:pages", "demo:snapshot", "worker:deploy", "worker:preview"}' package.json`
  * Result: PASS - expected scripts are present and Worker scripts remain unchanged.
  * Evidence: output showed `demo:build:pages`, `demo:preview:pages`, `demo:snapshot`, `worker:deploy`, and `worker:preview`.
* Command/check: `jq -r '.scripts["demo:build:pages"], .scripts["demo:preview:pages"]' package.json | grep -E 'demo:snapshot|worker:deploy|worker:preview' && exit 1 || printf 'pages scripts do not call snapshot or worker scripts\n'`
  * Result: PASS - Pages scripts do not call snapshot or Worker deployment commands.
  * Evidence: command printed `pages scripts do not call snapshot or worker scripts`.
* UI product-surface check: N/A - package scripts only.
* UI craft check: N/A - no UI changed.

***

### Task T010 - Add assembly CLI with validated inputs and non-zero failure exits

**Started**: 2026-06-24 13:25 **Completed**: 2026-06-24 13:26 **Duration**: 1 minute

**Notes**:

* Added a Bun CLI wrapper for the Pages dist assembly library.
* Added `--json`, `--quiet`, `--workspace-root`, and help output.
* Mapped library error codes to stable non-zero process exit codes.

**Files Changed**:

* `scripts/demo/assemble-pages-dist.ts` - added CLI wrapper around `assemblePagesDemoDist`.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T010 evidence.

**Verification**:

* Command/check: `bun run scripts/demo/assemble-pages-dist.ts --help`
  * Result: PASS - CLI usage output is available.
  * Evidence: command printed usage with `--json`, `--quiet`, `--workspace-root`, and `--help`.
* Command/check: `tmpdir=$(mktemp -d); set +e; output=$(bun run scripts/demo/assemble-pages-dist.ts --workspace-root "$tmpdir" --json 2>&1); code=$?; rm -rf "$tmpdir"; printf '%s\nexit=%s\n' "$output" "$code"; test "$code" -eq 2`
  * Result: PASS - missing input exits non-zero with structured error output.
  * Evidence: output contained `{ "ok": false, "code": "input_missing", ... }` and `exit=2`.
* UI product-surface check: N/A - build CLI only.
* UI craft check: N/A - no UI changed.

***

### Task T008 - Implement deterministic public-file copy helpers with idempotency protection

**Started**: 2026-06-24 13:23 **Completed**: 2026-06-24 13:24 **Duration**: 1 minute

**Notes**:

* Added sorted recursive copy helpers for deterministic client and public file promotion.
* Added destination type checks so directory/file collisions fail explicitly instead of silently overwriting an unsafe shape.
* Added a dist transaction that moves existing generated output to a backup, assembles into staging, promotes staging only after verification, and restores the backup on failure.

**Files Changed**:

* `scripts/lib/pages-demo-build.ts` - added transactional dist assembly, deterministic recursive copy helpers, collision checks, and rollback.
* `scripts/lib/__tests__/pages-demo-build.test.ts` - covered repeatable assembly and rollback after a public copy conflict.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T008 evidence.

**Verification**:

* Command/check: `bun run test -- scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - idempotency and rollback paths covered.
  * Evidence: Vitest reported 1 test file passed and 7 tests passed.
* Command/check: `grep -n "beginDistTransaction\|rollbackDistTransaction\|copyDirectoryContents\|assertDestinationCanReceiveDirectory\|assertDestinationCanReceiveFile" scripts/lib/pages-demo-build.ts`
  * Result: PASS - transaction, rollback, copy, and collision helpers are present.
  * Evidence: output listed all helper definitions and call sites.
* Command/check: `grep -n "restores the original dist\|clientDemoConflict\|reassembles after a fresh" scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - tests cover fresh-build reassembly and rollback on copy conflict.
  * Evidence: output listed the relevant test cases.
* UI product-surface check: N/A - build script library only.
* UI craft check: N/A - no UI changed.

**BQC Fixes**:

* Failure path completeness: rollback now restores the previous ignored `demo-website/dist` if assembly fails before final promotion (`scripts/lib/pages-demo-build.ts`).

***

### Task T009 - Implement client output promotion and server artifact pruning

**Started**: 2026-06-24 13:24 **Completed**: 2026-06-24 13:25 **Duration**: 1 minute

**Notes**:

* Promoted TanStack client output from `demo-website/dist/client` to the Pages deploy root.
* Pruned generated-only `client` and `server` directories by assembling only the client contents plus committed public files into the final root.
* Added output verification that fails if `client` or `server` remains in the Pages root.

**Files Changed**:

* `scripts/lib/pages-demo-build.ts` - added client promotion and generated-only directory verification.
* `scripts/lib/__tests__/pages-demo-build.test.ts` - covered client promotion, server pruning, and repeated fresh-build assembly.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T009 evidence.

**Verification**:

* Command/check: `bun run test -- scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - promotion and pruning behavior covered.
  * Evidence: Vitest reported 1 test file passed and 7 tests passed.
* Command/check: `grep -n "sourceClientDir\|promotedClientFiles\|Generated-only directory remained\|prunedDirectories" scripts/lib/pages-demo-build.ts`
  * Result: PASS - client source promotion and pruning verification are implemented.
  * Evidence: output listed source client, promoted file, generated-only verification, and pruned directory code paths.
* Command/check: `grep -n "promotes client output\|prunes server output\|prunedDirectories\|dist.*server" scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - tests assert root promotion and absence of generated-only server output.
  * Evidence: output listed the relevant assertions.
* UI product-surface check: N/A - build script library only.
* UI craft check: N/A - no UI changed.

***

### Task T007 - Implement Pages output constants, required-file checks, and error mapping

**Started**: 2026-06-24 13:22 **Completed**: 2026-06-24 13:23 **Duration**: 1 minute

**Notes**:

* Added exported Pages path constants for the demo website, public source root, dist root, and client output root.
* Added required-input verification for `client/index.html`, `_redirects`, `_headers`, and required demo fixture files.
* Added `PagesDemoBuildError` with explicit `input_missing`, `copy_failed`, `verify_failed`, and `write_failed` codes.

**Files Changed**:

* `scripts/lib/pages-demo-build.ts` - added path constants, input verification, output verification, and explicit error mapping.
* `scripts/lib/__tests__/pages-demo-build.test.ts` - covered explicit missing-input failures.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T007 evidence.

**Verification**:

* Command/check: `bun run test -- scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - required input and error-path behavior covered.
  * Evidence: Vitest reported 1 test file passed and 7 tests passed.
* Command/check: `grep -n "export const DEMO_WEBSITE_DIR\|export const PAGES_PUBLIC_DIR\|export const PAGES_DIST_DIR\|export const PAGES_CLIENT_OUTPUT_DIR\|PagesDemoBuildErrorCode\|REQUIRED_PUBLIC_FILES\|REQUIRED_OUTPUT_FILES" scripts/lib/pages-demo-build.ts`
  * Result: PASS - constants, error codes, and required-file lists are present.
  * Evidence: output included exported path constants, `PagesDemoBuildErrorCode`, `REQUIRED_PUBLIC_FILES`, and `REQUIRED_OUTPUT_FILES`.
* Command/check: `grep -n "Missing required Pages build input\|Assembled Pages output is missing required file\|Generated-only directory remained" scripts/lib/pages-demo-build.ts`
  * Result: PASS - explicit missing-input and output verification messages are implemented.
  * Evidence: output included the required error message sites.
* UI product-surface check: N/A - build script library only.
* UI craft check: N/A - no UI changed.

***

### Task T006 - Create Pages demo build assembly unit tests

**Started**: 2026-06-24 13:21 **Completed**: 2026-06-24 13:22 **Duration**: 1 minute

**Notes**:

* Added focused Vitest coverage for successful Pages assembly, required input failures, fixture copying, generated server/client pruning, repeatable assembly after a fresh build, and transaction rollback on public copy conflicts.

**Files Changed**:

* `scripts/lib/__tests__/pages-demo-build.test.ts` - added Pages demo build assembly tests.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T006 evidence.

**Verification**:

* Command/check: `bun run test -- scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - focused unit suite passes.
  * Evidence: Vitest reported 1 test file passed and 7 tests passed.
* UI product-surface check: N/A - test code only.
* UI craft check: N/A - no UI changed.

***

### Task T005 - Add conservative static security and cache headers source file

**Started**: 2026-06-24 13:21 **Completed**: 2026-06-24 13:21 **Duration**: 1 minute

**Notes**:

* Added conservative Pages `_headers` rules for base security headers, immutable generated assets, and short-lived committed demo fixtures.
* Kept the file static-only and analytics-free for v1.

**Files Changed**:

* `demo-website/public/_headers` - added Cloudflare Pages security and cache headers.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T005 evidence.

**Verification**:

* Command/check: `grep -q 'X-Content-Type-Options: nosniff' demo-website/public/_headers && grep -q 'X-Frame-Options: DENY' demo-website/public/_headers && grep -q 'Referrer-Policy: strict-origin-when-cross-origin' demo-website/public/_headers && grep -q 'Permissions-Policy: camera=(), microphone=(), geolocation=()' demo-website/public/_headers && grep -q 'Cache-Control: public, max-age=31536000, immutable' demo-website/public/_headers && grep -q 'Cache-Control: public, max-age=300' demo-website/public/_headers && printf 'headers ok: security and cache directives present\n'`
  * Result: PASS - required directives are present.
  * Evidence: command printed `headers ok: security and cache directives present`.
* UI product-surface check: N/A - static deployment headers file only.
* UI craft check: N/A - no UI changed.

***

### Task T004 - Add Cloudflare Pages SPA fallback source file

**Started**: 2026-06-24 13:20 **Completed**: 2026-06-24 13:20 **Duration**: 1 minute

**Notes**:

* Added a Pages `_redirects` source file for the routing boundary.
* During T016 preview validation, the initial catch-all rewrite was replaced with native Cloudflare Pages SPA fallback notes because Wrangler 4.92.0 flags `/* /index.html 200` as an infinite-loop redirect while Pages serves whole-site SPAs natively when no top-level `404.html` exists.

**Files Changed**:

* `demo-website/public/_redirects` - added Cloudflare Pages routing boundary file.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T004 evidence.

**Verification**:

* Command/check: `test "$(cat demo-website/public/_redirects)" = '/* /index.html 200' && printf 'redirects ok: SPA fallback present\n'`
  * Result: PASS at initial implementation time; superseded by T016 native SPA fallback adjustment.
  * Evidence: command initially printed `redirects ok: SPA fallback present`; T016 records the final warning-free preview behavior.
* UI product-surface check: N/A - static deployment routing file only.
* UI craft check: N/A - no UI changed.

***

### Task T003 - Review package and Worker deployment scripts

**Started**: 2026-06-24 13:19 **Completed**: 2026-06-24 13:19 **Duration**: 1 minute

**Notes**:

* Confirmed existing `build`, `worker:preview`, and `worker:deploy` scripts are Worker-oriented and should remain unchanged.
* Confirmed root `wrangler.jsonc` is a Worker config with `main: src/server.ts` and no `pages_build_output_dir`.
* Confirmed only one root Wrangler config exists.

**Files Changed**:

* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T003 evidence.

**Verification**:

* Command/check: `jq -r '.scripts | {build, "worker:preview", "worker:deploy", "demo:snapshot"}' package.json`
  * Result: PASS - current scripts establish a separate Worker deployment path.
  * Evidence: output showed Worker scripts use `wrangler dev/deploy --config dist/server/wrangler.json`; `demo:snapshot` is separate.
* Command/check: `sed -n '1,220p' wrangler.jsonc`
  * Result: PASS - root Wrangler file remains Worker-oriented.
  * Evidence: config contains `main: "src/server.ts"` and no Pages output setting.
* Command/check: `grep -R "pages_build_output_dir\|wrangler pages\|worker:deploy" -n package.json wrangler.jsonc docs demo-website 2>/dev/null | sed -n '1,120p'`
  * Result: PASS - Pages guidance exists only in docs/plans; root package currently has only Worker deploy commands.
  * Evidence: package match was `worker:deploy`; no root `pages_build_output_dir` match.
* UI product-surface check: N/A - script boundary review only.
* UI craft check: N/A - no UI changed.

***

### Task T002 - Confirm committed fixtures and local-only snapshot boundary

**Started**: 2026-06-24 13:18 **Completed**: 2026-06-24 13:18 **Duration**: 1 minute

**Notes**:

* Confirmed the committed public fixture set exists under `demo-website/public/demo`.
* Confirmed the snapshot exporter remains a separate local-only command and is documented as excluded from Cloudflare Pages builds.

**Files Changed**:

* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T002 evidence.

**Verification**:

* Command/check: `test -f demo-website/public/demo/live-data.snapshot.json && test -f demo-website/public/demo/snapshot-metadata.json && test -f demo-website/public/demo/graphs/index.json && test -f demo-website/public/demo/graphs/ai-os.json && test -f demo-website/public/demo/trend-finder-assets/README.md && jq -e '.schemaVersion == 1' demo-website/public/demo/snapshot-metadata.json >/dev/null && printf 'fixtures ok: live data, metadata, graph registry, graph payload, trend finder assets present\n'`
  * Result: PASS - committed public demo fixture boundary exists.
  * Evidence: command printed `fixtures ok: live data, metadata, graph registry, graph payload, trend finder assets present`.
* Command/check: `jq -r '.scripts["demo:snapshot"], (.scripts | keys[] | select(startswith("worker:")))' package.json`
  * Result: PASS - local snapshot and Worker scripts are distinct.
  * Evidence: output listed `bun run scripts/demo/export-pages-snapshot.ts`, `worker:deploy`, and `worker:preview`.
* Command/check: `grep -n "Cloudflare Pages builds consume the committed fixture files\|do not run.*demo:snapshot\|local-only command" demo-website/README.md`
  * Result: PASS - existing docs state the fixture authoring boundary.
  * Evidence: matched the local-only command section and Pages build rule lines.
* UI product-surface check: N/A - fixture verification only.
* UI craft check: N/A - no UI changed.

***

### Task T016 - Run static preview and validate ASCII/LF plus diff hygiene

**Started**: 2026-06-24 13:31 **Completed**: 2026-06-24 13:32 **Duration**: 1 minute

**Notes**:

* Started `bun run demo:preview:pages`; it rebuilt Pages output and served `demo-website/dist` through Wrangler Pages dev on `http://127.0.0.1:8788`.
* Initial preview exposed a Wrangler warning for `/* /index.html 200`; Cloudflare Pages native SPA rendering supports whole-site SPA routes when no top-level `404.html` exists, so `_redirects` now documents that boundary and the assembler rejects `404.html`.
* Re-ran preview after the routing adjustment; Wrangler parsed 0 redirect rules with no invalid-rule warning, parsed 3 header rules, and served the static root.
* Verified `/`, `/extensions/trend-finder/trends`, and `/demo/live-data.snapshot.json` returned HTTP 200 from Wrangler Pages dev.
* Stopped the Wrangler preview process after verification.

**Files Changed**:

* `demo-website/public/_redirects` - changed from invalid catch-all rewrite to native Pages SPA rendering boundary comments.
* `demo-website/README.md` - documented native Pages SPA rendering and the no top-level `404.html` requirement.
* `scripts/lib/pages-demo-build.ts` - added verification that rejects top-level `404.html` because it disables native SPA rendering.
* `scripts/lib/__tests__/pages-demo-build.test.ts` - added regression coverage for top-level `404.html`.
* `.spec_system/specs/phase31-session05-pages-build-and-deployment-scaffold/implementation-notes.md` - recorded T016 evidence.

**Verification**:

* Command/check: `bun run demo:preview:pages`
  * Result: PASS - preview built and served the static Pages root.
  * Evidence: command printed `Pages demo dist assembled`, `Parsed 0 valid redirect rules`, `Parsed 3 valid header rules`, and `Ready on http://127.0.0.1:8788`; no invalid redirect warning after the routing adjustment.
* Command/check: `curl -I --max-time 10 http://127.0.0.1:8788/ | sed -n '1,20p'`
  * Result: PASS - root route served by Wrangler Pages dev.
  * Evidence: response was `HTTP/1.1 200 OK` with static headers including `x-content-type-options`, `x-frame-options`, `referrer-policy`, and `permissions-policy`.
* Command/check: `curl -I --max-time 10 http://127.0.0.1:8788/extensions/trend-finder/trends | sed -n '1,24p'`
  * Result: PASS - client-side route served by native Pages SPA fallback.
  * Evidence: response was `HTTP/1.1 200 OK` with `Content-Type: text/html; charset=utf-8`.
* Command/check: `curl -I --max-time 10 http://127.0.0.1:8788/demo/live-data.snapshot.json | sed -n '1,24p'`
  * Result: PASS - committed demo fixture served from the static root.
  * Evidence: response was `HTTP/1.1 200 OK` with `Content-Type: application/json` and `Cache-Control: public, max-age=300`.
* Command/check: `test -f demo-website/dist/index.html && test -f demo-website/dist/_redirects && test -f demo-website/dist/_headers && test ! -f demo-website/dist/404.html && printf 'preview artifact ok: index, routing, headers present; no 404.html\n'`
  * Result: PASS - preview artifact contains required root files and preserves native SPA fallback conditions.
  * Evidence: command printed `preview artifact ok: index, routing, headers present; no 404.html`.
* Command/check: `bun run test -- scripts/lib/__tests__/pages-demo-build.test.ts`
  * Result: PASS - focused suite passes after native SPA fallback guard.
  * Evidence: Vitest reported 1 test file passed and 8 tests passed.
* Command/check: `bun run typecheck:scripts`
  * Result: PASS - script TypeScript compilation check passed.
  * Evidence: `tsc --noEmit -p tsconfig.scripts.json` exited with code 0.
* Command/check: `LC_ALL=C grep -nP '[^\x00-\x7F]' [touched files] && exit 1 || printf 'ascii ok\n'`
  * Result: PASS - touched source, docs, and spec files are ASCII-only.
  * Evidence: command printed `ascii ok`.
* Command/check: `grep -n $'\r' [touched files] && exit 1 || printf 'lf ok\n'`
  * Result: PASS - touched files use LF line endings.
  * Evidence: command printed `lf ok`.
* Command/check: `git diff --check`
  * Result: PASS - no whitespace errors.
  * Evidence: command exited with code 0 and no output.
* Command/check: `git status --short`
  * Result: PASS - changed files are the expected session files; generated `demo-website/dist` remains ignored.
  * Evidence: status listed `.spec_system/state.json`, the active session directory, Pages source files, package/docs/source/import changes, and new script/test files; no tracked `demo-website/dist` files.
* UI product-surface check: PASS - route `/extensions/trend-finder/trends` served as the product route through Wrangler Pages dev; no implementation diagnostics were introduced into route code.
* UI craft check: N/A - no user-facing UI components or styles changed.

**BQC Fixes**:

* Contract alignment: native Pages SPA rendering is now encoded in the build verifier by rejecting top-level `404.html` and documented in `demo-website/README.md`.

***

## Blockers & Solutions

### Blocker 1: Vite config alias resolution during Pages build

**Description**: `bun run demo:build:pages` initially failed because `vite.config.ts` imported a bridge that imported `src/extensions/trend-finder/source-setup.ts`, and that source file used `@/lib/public-demo` before Vite config alias resolution was active. **Impact**: T015 full Pages build could not complete. **Resolution**: Replaced that one config-loaded app alias import with a relative import in `src/extensions/trend-finder/source-setup.ts`. **Time Lost**: 1 minute

### Blocker 2: Wrangler invalid catch-all redirect warning

**Description**: `wrangler pages dev` flagged `/* /index.html 200` as an infinite-loop redirect and ignored it. **Impact**: T016 preview started, but the routing source emitted a warning and did not provide a valid redirect rule. **Resolution**: Used Cloudflare Pages native SPA rendering instead, kept `_redirects` as a routing-boundary file, documented the behavior, and added a build verifier guard against top-level `404.html`. **Time Lost**: 1 minute


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