infra/stacks/f1-stream/module/files/.planning/phases/01-scraper-validation/01-VERIFICATION.md

phase	verified	status	score	re_verification
01-scraper-validation	2026-02-17T20:58:00Z	passed	4/4 must-haves verified	false

Phase 1: Scraper Validation Verification Report

Phase Goal: Scraped URLs are verified to contain actual video/player content before being stored, eliminating junk links at the source

Verified: 2026-02-17T20:58:00Z

Status: PASSED

Re-verification: No — initial verification

Goal Achievement

Observable Truths

All 4 success criteria from ROADMAP.md verified:

#	Truth	Status	Evidence
1	Scraper still discovers F1-related posts using keyword filtering (existing behavior preserved)	✓ VERIFIED	reddit.go:105 calls isF1Post(post.Title) before processing posts. Keywords defined in f1Keywords slice (lines 29-39). Keyword filtering runs BEFORE validation step.
2	Each extracted URL is proxy-fetched and inspected for video/player content markers	✓ VERIFIED	scraper.go:62 calls validateLinks(links, s.validateTimeout) after URL extraction. validate.go:56-76 implements fetch + marker inspection with 20 video markers (HTML5, HLS, DASH, 10+ player libraries).
3	URLs without video content markers are discarded and do not appear in scraped.json	✓ VERIFIED	validate.go:71-73 logs discarded URLs and excludes them from return slice. Only URLs passing hasVideoContent() are kept in kept slice.
4	Validation respects a configurable timeout so slow sites do not block the scrape cycle	✓ VERIFIED	main.go:26 reads SCRAPER_VALIDATE_TIMEOUT env var (default 10s). validate.go:58 creates HTTP client with timeout. Passed through scraper.New() at main.go:56.

Score: 4/4 truths verified

Required Artifacts

All 4 artifacts from PLAN must_haves verified at all 3 levels (exists, substantive, wired):

Artifact	Expected	Exists	Substantive	Wired	Status
internal/scraper/validate.go	URL validation logic with video marker detection	✓	✓ 142 lines, 20 video markers, 4 functions	✓	✓ VERIFIED
internal/scraper/validate_test.go	Unit tests for marker detection and content type checks	✓	✓ 124 lines, 14 test cases covering positive/negative scenarios	✓	✓ VERIFIED
internal/scraper/scraper.go	validateTimeout field and validation call in scrape()	✓	✓ validateTimeout field on line 16, validateLinks call on line 62	✓	✓ VERIFIED
main.go	SCRAPER_VALIDATE_TIMEOUT env var configuration	✓	✓ Line 26 reads env var, line 56 passes to scraper.New()	✓	✓ VERIFIED

Artifact Details:

validate.go (142 lines):

• Contains validateLinks function (lines 56-76)
• Contains hasVideoContent function (lines 81-119)
• Contains containsVideoMarkers function (lines 123-130)
• Contains isDirectVideoContentType function (lines 134-142)
• Defines 20 video markers (lines 15-40): HTML5 <video, HLS (.m3u8, application/x-mpegurl), DASH (.mpd, application/dash+xml), 15 player libraries (hls.js, video.js, jwplayer, clappr, flowplayer, plyr, shaka-player, mediaelement, fluidplayer, etc.)
• Defines 4 video content types (lines 44-49)
• Sets 2MB body limit (line 52)
• 3 redirect limit (line 60)

validate_test.go (124 lines):

• TestContainsVideoMarkers: 10 positive cases (video tag, HLS manifest, DASH manifest, HLS.js, Video.js, JW Player, Clappr, Flowplayer, Plyr, Shaka Player) + 4 negative cases (plain HTML, Reddit link page, blog post, empty string)
• TestIsDirectVideoContentType: 6 positive cases (video/mp4, video/webm, HLS content types, DASH, video with params) + 5 negative cases (text/html, application/json, image/png, text/plain, empty)
• Total: 14 test cases covering 25 assertion points

scraper.go:

• Line 16: validateTimeout time.Duration field added to Scraper struct
• Line 20-21: New() function updated to accept validateTimeout parameter
• Lines 60-65: Validation step inserted between URL extraction and merge logic

main.go:

• Line 26: validateTimeout := envDuration("SCRAPER_VALIDATE_TIMEOUT", 10*time.Second)
• Line 56: sc := scraper.New(st, scrapeInterval, validateTimeout)

Key Link Verification

All 2 key links from PLAN must_haves verified:

From	To	Via	Status	Details
internal/scraper/scraper.go	internal/scraper/validate.go	validateLinks call in scrape()	✓ WIRED	scraper.go:62 calls validateLinks(links, s.validateTimeout) between URL extraction (scrapeReddit() return at line 58) and store merge (LoadScrapedLinks() at line 68)
main.go	internal/scraper/scraper.go	scraper.New() with validateTimeout	✓ WIRED	main.go:56 calls scraper.New(st, scrapeInterval, validateTimeout) where validateTimeout is read from env on line 26

Wiring Verification:

Link 1: scraper.go → validate.go

• Pattern match: validateLinks\(links found at scraper.go:62
• Context: Call occurs after scrapeReddit() (line 53) and before LoadScrapedLinks() (line 68)
• Data flow: links variable from scrapeReddit() → filtered by validateLinks() → assigned back to links → merged with existing

Link 2: main.go → scraper.go

• Pattern match: scraper\.New\(st.*validateTimeout found at main.go:56
• Context: validateTimeout variable read from env on line 26, passed as 3rd parameter to scraper.New()
• Parameter flow: envDuration("SCRAPER_VALIDATE_TIMEOUT", 10*time.Second) → validateTimeout variable → scraper.New() parameter → Scraper.validateTimeout field → validateLinks() call

Requirements Coverage

All 4 requirements from PLAN frontmatter verified against REQUIREMENTS.md:

Requirement	Description	Status	Evidence
SCRP-01	Scraper filters Reddit posts by F1 keywords before extracting URLs (existing behavior, preserve)	✓ SATISFIED	reddit.go:105 calls isF1Post(post.Title) before processing. Keywords defined in f1Keywords (lines 29-39). This runs BEFORE validation, preserving existing behavior.
SCRP-02	Scraper validates each extracted URL by proxy-fetching it and checking for video/player content markers	✓ SATISFIED	validate.go:56-76 implements validateLinks() which calls hasVideoContent() for each URL. hasVideoContent() (lines 81-119) performs HTTP GET and checks for video markers.
SCRP-03	URLs that don't look like streams are discarded before saving	✓ SATISFIED	validate.go:71-73 logs and excludes URLs where hasVideoContent() returns false. Only kept URLs are returned and merged into store.
SCRP-04	Validation has a configurable timeout (default 10s) to avoid blocking on slow sites	✓ SATISFIED	main.go:26 reads SCRAPER_VALIDATE_TIMEOUT with default 10s. validate.go:58 creates HTTP client with timeout. 3-redirect limit also prevents timeout from slow redirect chains.

No orphaned requirements: All 4 requirements mapped to Phase 1 in REQUIREMENTS.md are accounted for in the PLAN and satisfied by the implementation.

Anti-Patterns Found

No anti-patterns detected:

Category	Checked	Found
TODO/FIXME/PLACEHOLDER comments	✓	0
Placeholder strings	✓	0
Empty implementations (return null/empty)	✓	0
Console-only implementations	✓	0

Files checked:

• internal/scraper/validate.go (142 lines)
• internal/scraper/validate_test.go (124 lines)
• internal/scraper/scraper.go (modified section lines 16, 20-21, 60-65)
• main.go (modified lines 26, 56)

All modified code is production-ready with proper error handling, logging, and no stub patterns.

Human Verification Required

None. All success criteria are programmatically verifiable through code inspection:

• Keyword filtering behavior: Verified by checking isF1Post() call placement
• URL validation with HTTP fetch: Verified by code inspection of validateLinks() and hasVideoContent()
• Discard behavior: Verified by inspecting return logic in validateLinks()
• Timeout configuration: Verified by tracing env var read → parameter passing → HTTP client creation

Note: While the functionality of video marker detection would ideally be tested against real stream URLs, the implementation of the requirement (that validation logic exists, is wired correctly, and has appropriate markers) is fully verified.

Verification Summary

All Must-Haves VERIFIED

Truths (4/4):

1. ✓ F1 keyword filtering preserved (SCRP-01)
2. ✓ URLs proxy-fetched and inspected for video markers (SCRP-02)
3. ✓ Non-stream URLs discarded (SCRP-03)
4. ✓ Configurable timeout prevents blocking (SCRP-04)

Artifacts (4/4):

1. ✓ validate.go exists, substantive (142 lines, 20 markers, 4 functions), wired
2. ✓ validate_test.go exists, substantive (124 lines, 14 test cases), wired
3. ✓ scraper.go exists, substantive (validateTimeout field + call), wired
4. ✓ main.go exists, substantive (env var read + pass to New()), wired

Key Links (2/2):

1. ✓ scraper.go → validate.go via validateLinks call
2. ✓ main.go → scraper.go via scraper.New() with validateTimeout

Requirements (4/4):

1. ✓ SCRP-01 satisfied
2. ✓ SCRP-02 satisfied
3. ✓ SCRP-03 satisfied
4. ✓ SCRP-04 satisfied

Anti-Patterns: None found

Human Verification: Not required

Implementation Quality

Strengths:

• 20 comprehensive video markers covering HTML5, HLS, DASH, and 15 player libraries
• Proper error handling throughout (HTTP errors, read errors, invalid URLs)
• Conservative resource limits (2MB body read limit, 3 redirect limit)
• Comprehensive unit test coverage (14 test cases, 25 assertion points)
• Clean integration preserving existing F1 keyword filtering (SCRP-01)
• Follows existing codebase patterns (envDuration config, logging style, truncate utility)

Commits: All 3 tasks committed atomically:

1. adeb478 - Create validate.go with video marker detection
2. 22d29db - Wire validation into scraper pipeline and add config
3. 6c5cc02 - Add unit tests for validation functions

No deviations from plan: Implementation matches PLAN tasks exactly.

Conclusion

Phase 1 goal ACHIEVED.

All success criteria from ROADMAP.md are satisfied:

1. ✓ Keyword filtering preserved
2. ✓ URLs validated with video marker detection
3. ✓ Non-stream URLs discarded
4. ✓ Configurable timeout prevents blocking

All artifacts exist, are substantive, and are wired correctly. All key links verified. All requirements satisfied. No anti-patterns found. No gaps requiring remediation.

Ready to proceed to Phase 2.

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Verified: 2026-02-17T20:58:00Z Verifier: Claude (gsd-verifier)