Metadata Linting

User Perspective

The linting feature automatically checks video metadata and descriptions for quality issues. Lint results appear as badges on the video list and as a collapsible section in the video editor header.

Lint Page (`/linting`)

Shows all open (unresolved) lint results across the team. Filter by severity or rule code. Results can be individually resolved (marking them as acknowledged). Navigating to the linting page automatically triggers a background heal that corrects any stale lintStatus values on video records.

Lint Status on Videos

Videos show one of three statuses:

OK — no open lint issues
WARNING — at least one warning, no errors
ERROR — at least one error

The "Lint Issues" tab on the Videos page shows all videos with WARNING or ERROR status.

Resolving Issues

Resolving a lint result marks it as resolvedAt = now(). It will reappear on the next lint run if the underlying issue is not fixed. Bulk-resolve is supported.

Developer Perspective

Rules

All rules implement the LintRule interface: { code: string, severity: LintSeverity, check(video): LintIssue | null }.

LintSeverity has three values: ERROR, WARNING, and INFO. No current rule uses INFO — it is reserved for future informational hints. Important: computeStatus() only checks for ERROR and WARNING when computing Video.lintStatus. A video with only INFO results will have lintStatus: OK. This is intentional — INFO is non-actionable and should not surface as a problem on the video list.

Rule Code	Severity	What it checks
`TITLE_WEAK`	WARNING	Title < 20 chars or contains generic words (video, test, untitled, new video, upload)
`TITLE_TOO_LONG`	WARNING	Title > 100 characters
`DESC_MISSING_CTA`	WARNING	Description lacks CTA keywords (subscribe, abonnieren, follow, like, comment, cta)
`DESC_MISSING_CHAPTERS`	WARNING	Description has fewer than 2 timestamp patterns (`\d{1,2}:\d{2}`)
`DESC_EMPTY_PLACEHOLDER`	ERROR	Description contains unresolved `{placeholder}` patterns
`DESC_DUPLICATE_HASHTAG`	WARNING	Description has duplicate hashtags (case-insensitive)
`DESC_REQUIRED_LINK_MISSING`	ERROR	Description missing a required link defined in `template.rules.requiredLinks`
`DESC_OUTDATED_SPONSOR_COPY`	ERROR	A CAMPAIGN block references an expired or inactive campaign
`REMOTE_CONFLICT`	ERROR	`video.remoteConflict` is true — YouTube-side metadata changed since last sync

Lint Execution Flow

LintProcessor receives { videoId } from the lint queue
Calls LintingService.lintVideo(videoId)
Fetches video with config, template, existing lint results, and team's disabledLintRules
Filters rules: removes any whose code is in disabledLintRules
Runs each active rule's check() method
Wraps in a transaction: deletes all unresolved results, creates new ones, updates Video.lintStatus

Disabling Rules

Team admins can disable specific rules in Settings. When a rule is disabled:

Existing unresolved LintResult rows for that rule are deleted
Video.lintStatus is recomputed for all affected videos
Future lint runs skip that rule

Stale lintStatus

Video.lintStatus is a denormalized cache. It can become stale if LintResult rows are deleted outside of lintVideo(). The heal endpoint POST /lint/team/recompute-status corrects all stale statuses in one query. This endpoint is called automatically when the linting page loads.

Adding a New Lint Rule

Create backend/src/modules/linting/rules/your-rule.rule.ts implementing LintRule
Import and instantiate it in LintingService.rules[] array
The rule will run automatically on all subsequent lint jobs

03 - Linting API
01 - Video Management
13 - Team Settings

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