redirect

new-endpoint · 5 of 5 promises kept

Promises kept5 / 5none broken

TierCore P2new-endpoint

Kill switchnone (Core: rollback)Core features roll back instead

Originbase featureGET /r/{code}

Promises

grouped by type

	Promise and latest result	Severity	Checked in
behavior · 2
	redirect-works A short link sends people to its long URL Kept in production (live check, 27 Oct 12:55 UTC)	blocker	merge requesttest driveproduction
	redirect-unknown-404 An unknown short link answers 404, not an error Kept in production (live check, 27 Oct 12:55 UTC)	major	merge requesttest driveproduction
speed · 1
	redirect-fast 95% of redirects finish in under 150 ms Kept on its merge request (checked before every merge)	blocker	merge requesttest driveproduction
reliability · 1
	redirect-reliable Fewer than 0.1% of redirects fail Kept on its merge request (checked before every merge)	blocker	merge requesttest driveproduction
security · 1
	redirect-rejects-odd-codes Codes with characters outside letters, digits, dash and underscore are refused Kept on its merge request (checked before every merge)	major	merge requesttest drive

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promises/features/base-redirect.yaml

feature: redirect
issue: null
kind: new-endpoint
tier: core
priority: P2
owns:
  routes:
  - GET /r/{code}
  files:
  - app/features/redirect.py
flag: null
promises:
  behavior:
  - id: redirect-works
    says: A short link sends people to its long URL
    steps:
    - 'POST /api/links {url: ''https://example.com/r-{rand}''} -> 201 => link'
    - GET /r/{link.code} -> 302 https://example.com/r-{rand}
    where:
    - mr
    - drive
    - live
    severity: blocker
  - id: redirect-unknown-404
    says: An unknown short link answers 404, not an error
    steps:
    - GET /r/unknown{rand} -> 404
    where:
    - mr
    - drive
    - live
    severity: major
  speed:
  - id: redirect-fast
    says: 95% of redirects finish in under 150 ms
    measure: p95(latency, route='GET /r/{code}') < 150ms
    where:
    - mr
    - drive
    - live
    severity: blocker
  reliability:
  - id: redirect-reliable
    says: Fewer than 0.1% of redirects fail
    measure: error_rate(route='GET /r/{code}') < 0.1%
    where:
    - mr
    - drive
    - live
    severity: blocker
  security:
  - id: redirect-rejects-odd-codes
    says: Codes with characters outside letters, digits, dash and underscore are refused
    steps:
    - GET /r/a.b -> 404
    - GET /r/a%27b -> 404
    where:
    - mr
    - drive
    severity: major