diff --git a/.gsd/DECISIONS.md b/.gsd/DECISIONS.md
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+# Decisions Register
+
+<!-- Append-only. Never edit or remove existing rows.
+     To reverse a decision, add a new row that supersedes it.
+     Read this file at the start of any planning or research phase. -->
+
+| # | When | Scope | Decision | Choice | Rationale | Revisable? |
+|---|------|-------|----------|--------|-----------|------------|
+| D001 | M001 | arch | Backend framework | Python 3.12 + FastAPI | Async-first, Pydantic v2, SSE support, well-documented yt-dlp integration patterns | No |
+| D002 | M001 | arch | Frontend framework | Vue 3 + TypeScript + Pinia + Vite | Composition API, `<script setup>`, Pinia 3 (Vuex dead for Vue 3), Vite 8 with Rolldown | No |
+| D003 | M001 | arch | Real-time transport | SSE via sse-starlette (not WebSocket) | Server-push only needed; SSE is simpler, HTTP-native, auto-reconnecting. sse-starlette has better disconnect handling than FastAPI native SSE | No |
+| D004 | M001 | arch | Database | SQLite via aiosqlite with WAL mode | Single-file, zero external deps, sufficient for single-instance self-hosted tool. WAL required for concurrent download writes | No |
+| D005 | M001 | arch | yt-dlp integration | Library import, not subprocess | Structured progress hooks, no shell injection surface, typed error info | No |
+| D006 | M001 | arch | Sync-to-async bridge | ThreadPoolExecutor + loop.call_soon_threadsafe | YoutubeDL not picklable (rules out ProcessPoolExecutor). call_soon_threadsafe is the only safe bridge from sync threads to asyncio Queue | No |
+| D007 | M001 | arch | Session identity | Opaque UUID in httpOnly cookie, all state in SQLite | Starlette SessionMiddleware signs entire session dict into cookie — grows unboundedly and can be decoded. Opaque ID is simpler and safer | No |
+| D008 | M001 | arch | Admin authentication | HTTPBasic + bcrypt 5.0.0 (direct, not passlib) | passlib is unmaintained, breaks on Python 3.13. bcrypt direct is simple and correct. timing-safe comparison via secrets.compare_digest | No |
+| D009 | M001 | arch | Config hierarchy | Defaults → config.yaml → env vars → SQLite admin writes | Operators need both infra-as-code (YAML, env) AND live UI config. YAML seeds DB on first boot, then SQLite wins | No |
+| D010 | M001 | arch | Scheduler | APScheduler 3.x AsyncIOScheduler (not 4.x alpha) | 3.x is stable and well-documented. 4.x is alpha with breaking changes | Yes — when 4.x ships stable |
+| D011 | M001 | convention | TLS handling | Reverse proxy responsibility, not in-container | Standard self-hosted pattern. App provides startup warning when admin enabled without TLS. Secure deployment example with reverse proxy sidecar | No |
+| D012 | M001 | convention | Commit strategy | Branch-per-slice with squash merge to main | Clean main history, one commit per slice, individually revertable | No |
+| D013 | M001 | scope | Anti-features | OAuth/SSO, WebSocket, user accounts, embedded player, auto-update yt-dlp, subscription monitoring, FlareSolverr — all explicitly out of scope | Each would massively increase scope or conflict with anonymous-first, zero-telemetry positioning | No |
diff --git a/.gsd/PROJECT.md b/.gsd/PROJECT.md
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+# media.rip()
+
+## What This Is
+
+A self-hostable, redistributable Docker container — a web-based yt-dlp frontend that anyone can run on their own infrastructure. Users paste a URL, pick quality, and download media without creating an account, sending data anywhere, or knowing what a terminal is. Ships with a cyberpunk default theme, session isolation, and ephemeral downloads. Fully configurable via mounted config file for personal, family, team, or public use.
+
+Ground-up build. Not a MeTube fork. Treats theming, session behavior, purge policy, and operator experience as first-class concerns.
+
+## Core Value
+
+A user can paste any yt-dlp-supported URL, see exactly what they're about to download, and get it — without creating an account, without sending data anywhere, and without knowing what a terminal is.
+
+## Current State
+
+Greenfield. Spec complete (see `/PROJECT.md`). Architecture, feature, stack, and pitfall research complete (see `.planning/research/`). No code written yet.
+
+## Architecture / Key Patterns
+
+- **Backend:** Python 3.12 + FastAPI, yt-dlp as library (not subprocess), aiosqlite for SQLite, sse-starlette for SSE, APScheduler 3.x for cron, bcrypt for admin auth
+- **Frontend:** Vue 3 + TypeScript + Pinia + Vite
+- **Transport:** SSE (server-push only, no WebSocket)
+- **Persistence:** SQLite with WAL mode
+- **Critical pattern:** `ThreadPoolExecutor` + `loop.call_soon_threadsafe` bridges sync yt-dlp into async FastAPI — the load-bearing architectural seam
+- **Session isolation:** Per-browser cookie-scoped queues (isolated/shared/open modes)
+- **Config hierarchy:** Hardcoded defaults → config.yaml → env var overrides → SQLite admin writes
+- **Distribution:** Single multi-stage Docker image, GHCR + Docker Hub, amd64 + arm64
+
+## Capability Contract
+
+See `.gsd/REQUIREMENTS.md` for the explicit capability contract, requirement status, and coverage mapping.
+
+## Milestone Sequence
+
+- [ ] M001: media.rip() v1.0 — Full-featured self-hosted yt-dlp web frontend, Docker-distributed
diff --git a/.gsd/REQUIREMENTS.md b/.gsd/REQUIREMENTS.md
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+# Requirements
+
+This file is the explicit capability and coverage contract for the project.
+
+Use it to track what is actively in scope, what has been validated by completed work, what is intentionally deferred, and what is explicitly out of scope.
+
+## Active
+
+### R001 — URL submission + download for any yt-dlp-supported site
+- Class: core-capability
+- Status: active
+- Description: User pastes any URL supported by yt-dlp and the system downloads it to the configured output directory
+- Why it matters: The fundamental product primitive — everything else depends on this working
+- Source: user
+- Primary owning slice: M001/S01
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Jobs keyed by UUID4 (R024), not URL — concurrent same-URL downloads are supported
+
+### R002 — Live format/quality extraction and selection
+- Class: core-capability
+- Status: active
+- Description: GET /api/formats?url= calls yt-dlp extract_info to return available formats; user picks resolution, codec, ext before downloading
+- Why it matters: Power users won't use a tool that hides quality choice. Competitors use presets — live extraction is a step up
+- Source: user
+- Primary owning slice: M001/S01
+- Supporting slices: M001/S03
+- Validation: unmapped
+- Notes: Extraction can take 3-10s for some sites — UI must show loading state. filesize is frequently null
+
+### R003 — Real-time SSE progress
+- Class: core-capability
+- Status: active
+- Description: Server-sent events stream delivers job status transitions (queued→extracting→downloading→completed/failed) with download progress (percent, speed, ETA) per session
+- Why it matters: No progress = no trust. Users need to see something is happening
+- Source: user
+- Primary owning slice: M001/S02
+- Supporting slices: M001/S03
+- Validation: unmapped
+- Notes: SSE via sse-starlette, not WebSocket. Events: init, job_update, job_removed, error, purge_complete
+
+### R004 — SSE init replay on reconnect
+- Class: continuity
+- Status: active
+- Description: When a client reconnects to the SSE endpoint, the server replays current job states from the DB as synthetic events before entering the live queue
+- Why it matters: Without this, page refresh clears the queue view even though downloads are running. Breaks session isolation's value proposition entirely
+- Source: user
+- Primary owning slice: M001/S02
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Eliminates "spinner forever after refresh" bugs. The DB is source of truth, not frontend memory
+
+### R005 — Download queue: view, cancel, filter, sort
+- Class: primary-user-loop
+- Status: active
+- Description: Users see all their downloads in a unified queue with status, progress, and can cancel or remove entries. Filter by status, sort by date/name
+- Why it matters: Table stakes for any download manager UX
+- Source: user
+- Primary owning slice: M001/S03
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Queue is a projection of SQLite state replayed via SSE
+
+### R006 — Playlist support: parent + collapsible child jobs
+- Class: core-capability
+- Status: active
+- Description: Playlist URLs create a parent job with collapsible child video rows. Parent status reflects aggregate child progress. Mixed success/failure shown per child
+- Why it matters: Playlists are a primary use case for self-hosters. MeTube treats them as flat — collapsible parent/child is a step up
+- Source: user
+- Primary owning slice: M001/S03
+- Supporting slices: M001/S01
+- Validation: unmapped
+- Notes: A 200-video playlist = 201 rows — must be collapsed by default. Parent completes when all children reach completed or failed
+
+### R007 — Session isolation: isolated (default) / shared / open modes
+- Class: differentiator
+- Status: active
+- Description: Operator selects session mode server-wide. Isolated: each browser sees only its own downloads via httpOnly UUID cookie. Shared: all sessions see all downloads. Open: no session tracking
+- Why it matters: The primary differentiator from MeTube (issue #591 closed as "won't fix"). The feature that created demand for forks
+- Source: user
+- Primary owning slice: M001/S02
+- Supporting slices: M001/S03
+- Validation: unmapped
+- Notes: isolated is the zero-config safe default. Mode switching mid-deployment: isolated rows remain scoped, shared queries all rows
+
+### R008 — Cookie auth: per-session cookies.txt upload
+- Class: core-capability
+- Status: active
+- Description: Users upload a Netscape-format cookies.txt file scoped to their session. Enables downloading paywalled/private content. Files purged on session clear
+- Why it matters: The practical reason people move off MeTube. Enables authenticated downloads without embedding credentials in the app
+- Source: research
+- Primary owning slice: M001/S04
+- Supporting slices: none
+- Validation: unmapped
+- Notes: CVE-2023-35934 — pin yt-dlp >= 2023-07-06. Store per-session at data/sessions/{id}/cookies.txt. Never log contents. Normalize CRLF→LF. Chrome cookie extraction broken since July 2024 — surface Firefox recommendation in UI
+
+### R009 — Purge system: scheduled/manual/never, independent file + log TTL
+- Class: operability
+- Status: active
+- Description: Operator configures purge mode (scheduled cron, manual-only, never). File TTL and log TTL are independent values. Purge activity written to audit log. Purge must skip active downloads
+- Why it matters: Ephemeral storage is the contract with users. Operators need control over disk lifecycle
+- Source: user
+- Primary owning slice: M001/S04
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Purge must filter status IN (completed, failed, cancelled) — never delete files for active downloads. Handle already-deleted files gracefully
+
+### R010 — Three built-in themes: cyberpunk (default), dark, light
+- Class: differentiator
+- Status: active
+- Description: Three themes baked into the Docker image. Cyberpunk is default: #00a8ff/#ff6b2b, JetBrains Mono, scanlines, grid overlay. Dark and light are clean alternatives
+- Why it matters: Visual identity differentiator — every other tool ships with plain material/tailwind defaults. Cyberpunk makes first impressions memorable
+- Source: user
+- Primary owning slice: M001/S05
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Built-in themes compiled into frontend bundle. Heavily commented as drop-in documentation for custom theme authors
+
+### R011 — Drop-in custom theme system via volume mount
+- Class: differentiator
+- Status: active
+- Description: Operators drop a theme folder into /themes volume mount. Theme pack: theme.css (CSS variable overrides) + metadata.json + optional preview.png + optional assets/. Appears in picker without recompile
+- Why it matters: The feature MeTube refuses to build. Lowers theming floor to "edit a CSS file"
+- Source: user
+- Primary owning slice: M001/S05
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Theme directory scanned at startup + on-demand re-scan. No file watchers needed
+
+### R012 — CSS variable contract (base.css) as stable theme API
+- Class: constraint
+- Status: active
+- Description: A documented, stable set of CSS custom properties (--color-bg, --color-accent-primary, --font-ui, --radius-sm, --effect-overlay, etc.) that all themes override. Token names cannot change after v1.0 ships — they are the public API for custom themes
+- Why it matters: Changing token names after operators write custom themes breaks those themes. This is a one-way door
+- Source: user
+- Primary owning slice: M001/S05
+- Supporting slices: M001/S03
+- Validation: unmapped
+- Notes: Must be designed before component work references token names. Establish early in S05, referenced by S03 components
+
+### R013 — Mobile-responsive layout
+- Class: primary-user-loop
+- Status: active
+- Description: <768px breakpoint: bottom tab bar (Submit/Queue/Settings), full-width URL input, card list for queue (swipe-to-cancel), bottom sheet for format options. All tap targets minimum 44px
+- Why it matters: >50% of self-hoster interactions happen on phone or tablet. No existing yt-dlp web UI does mobile well
+- Source: user
+- Primary owning slice: M001/S03
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Desktop (≥768px): top header bar, left sidebar (collapsible), full download table
+
+### R014 — Admin panel with secure auth
+- Class: operability
+- Status: active
+- Description: Admin panel with username/password login (HTTPBasic + bcrypt). First-boot credential setup with forced change prompt. Session list, storage view, manual purge trigger, live config editor, unsupported URL log download. Security posture: timing-safe comparison (secrets.compare_digest), Secure/HttpOnly/SameSite=Strict cookies behind TLS, security headers on admin routes (HSTS, X-Content-Type-Options, X-Frame-Options), startup warning when admin enabled without TLS detected
+- Why it matters: Shipping an admin panel with crappy auth undermines the trust proposition of the entire product. Operators deserve qBittorrent/Sonarr-level login UX, not raw tokens
+- Source: user
+- Primary owning slice: M001/S04
+- Supporting slices: none
+- Validation: unmapped
+- Notes: If no X-Forwarded-Proto: https detected, log warning. Admin routes hidden from nav unless credentials configured
+
+### R015 — Unsupported URL reporting with audit log
+- Class: failure-visibility
+- Status: active
+- Description: When yt-dlp fails with extraction error, job shows failed badge + "Report unsupported site" button. Click appends to log (domain-only by default, full URL opt-in). Admin downloads log. Zero automatic outbound reporting
+- Why it matters: Users see exactly what gets logged. Trust feature — transparency in failure handling
+- Source: user
+- Primary owning slice: M001/S04
+- Supporting slices: none
+- Validation: unmapped
+- Notes: User-triggered only. Config report_full_url controls privacy level
+
+### R016 — Health endpoint
+- Class: operability
+- Status: active
+- Description: GET /api/health returns status, version, yt_dlp_version, uptime
+- Why it matters: Uptime Kuma and similar monitoring tools are table stakes for self-hosters
+- Source: user
+- Primary owning slice: M001/S02
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Extend with disk space and queue depth if practical
+
+### R017 — Session export/import
+- Class: continuity
+- Status: active
+- Description: Export session as JSON archive (download history + queue state + preferences). Import restores history into a new session. Does not require sign-in, stays anonymous-first
+- Why it matters: Enables identity continuity on persistent instances without a real account system. No competitor offers this
+- Source: research
+- Primary owning slice: M001/S04
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Meaningless in open mode — UI should hide export button when session mode is open
+
+### R018 — Link sharing (completed file shareable URL)
+- Class: primary-user-loop
+- Status: active
+- Description: Completed downloads are served at predictable URLs. Users can copy a direct download link to share with others
+- Why it matters: Removes the "now what?" question after downloading — users share a ripped file with a friend via URL
+- Source: research
+- Primary owning slice: M001/S04
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Requires knowing the output filename. Files served via FastAPI StaticFiles or explicit route on /downloads
+
+### R019 — Source-aware output templates
+- Class: core-capability
+- Status: active
+- Description: Per-site default output templates (YouTube: uploader/title, SoundCloud: uploader/title, generic: title). Configurable via config.yaml source_templates map
+- Why it matters: Sensible defaults per-site are a step up from MeTube's single global template. Organizes downloads without user effort
+- Source: user
+- Primary owning slice: M001/S01
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Per-download override also supported (R025)
+
+### R020 — Zero automatic outbound telemetry
+- Class: constraint
+- Status: active
+- Description: The container makes zero automatic outbound network requests. No CDN calls, no Google Fonts, no update checks, no analytics. All fonts and assets bundled or self-hosted
+- Why it matters: Trust is the core proposition. Competing tools have subtle external requests. This is an explicit design constraint, not an afterthought
+- Source: user
+- Primary owning slice: M001/S06
+- Supporting slices: all
+- Validation: unmapped
+- Notes: Verified by checking zero outbound network requests from container during normal operation
+
+### R021 — Docker: single multi-stage image, GHCR + Docker Hub, amd64 + arm64
+- Class: launchability
+- Status: active
+- Description: Single Dockerfile, multi-stage build (Node frontend builder → Python deps → slim runtime with ffmpeg). Published to ghcr.io/xpltd/media-rip and docker.io/xpltd/media-rip. Both amd64 and arm64 architectures
+- Why it matters: Docker is the distribution mechanism for self-hosted tools. arm64 users (Raspberry Pi, Apple Silicon NAS) are a significant audience
+- Source: user
+- Primary owning slice: M001/S06
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Target <400MB compressed. ffmpeg from Debian apt supports arm64 natively
+
+### R022 — CI/CD: lint + test on PR, build + push on tag
+- Class: launchability
+- Status: active
+- Description: GitHub Actions: ci.yml runs ruff + pytest + eslint + vue-tsc + vitest + Docker smoke on PRs. publish.yml builds multi-platform image and pushes to both registries on v*.*.* tags. Generates GitHub Release with changelog
+- Why it matters: Ensures the image stays functional as yt-dlp extractors evolve. Automated quality gate
+- Source: user
+- Primary owning slice: M001/S06
+- Supporting slices: none
+- Validation: unmapped
+- Notes: CI smoke-tests downloads from 2+ sites to catch extractor breakage
+
+### R023 — Config system: config.yaml + env var overrides + admin live writes
+- Class: operability
+- Status: active
+- Description: Three-layer config: hardcoded defaults → config.yaml (read-only at start) → env var overrides (MEDIARIP__SECTION__KEY) → SQLite admin writes (live, no restart). All fields optional — zero-config works out of the box
+- Why it matters: Operators need infrastructure-as-code (YAML, env vars) AND live UI config without restart
+- Source: user
+- Primary owning slice: M001/S01
+- Supporting slices: M001/S04
+- Validation: unmapped
+- Notes: YAML seeds DB on first boot, then SQLite wins. YAML never reflects admin UI changes — document this clearly
+
+### R024 — Concurrent same-URL support
+- Class: core-capability
+- Status: active
+- Description: Jobs keyed by UUID4, not URL. Submitting the same URL twice at different qualities creates two independent jobs
+- Why it matters: Users legitimately want the same video in different formats. URL-keyed dedup would prevent this
+- Source: user
+- Primary owning slice: M001/S01
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Intentional design per PROJECT.md
+
+### R025 — Per-download output template override
+- Class: core-capability
+- Status: active
+- Description: Users can override the output template on a per-download basis, in addition to the source-aware defaults (R019)
+- Why it matters: Power users want control over file naming for specific downloads
+- Source: user
+- Primary owning slice: M001/S03
+- Supporting slices: none
+- Validation: unmapped
+- Notes: UI field in "More options" area
+
+### R026 — Secure deployment example
+- Class: launchability
+- Status: active
+- Description: docker-compose.example.yml ships with a reverse proxy + TLS configuration as the default documented deployment path, not an afterthought
+- Why it matters: Making the secure path the default path prevents operators from accidentally running admin auth over cleartext
+- Source: user
+- Primary owning slice: M001/S06
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Caddy or Traefik sidecar — decision deferred to slice planning
+
+## Deferred
+
+### R027 — Per-format download presets (saved quality profiles)
+- Class: primary-user-loop
+- Status: deferred
+- Description: Save "my 720p MP3 preset" for reuse across downloads
+- Why it matters: Convenience feature for repeat users
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Deferred — v1 needs live format selection working first. Add when session system is stable
+
+### R028 — GitHub issue prefill for unsupported URL reporting
+- Class: failure-visibility
+- Status: deferred
+- Description: Config option reporting.github_issues: true opens pre-filled GitHub issue for unsupported URLs
+- Why it matters: Streamlines community reporting of extractor gaps
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Deferred — enable only after log download (R015) is validated
+
+### R029 — Queue filter/sort persistence in localStorage
+- Class: primary-user-loop
+- Status: deferred
+- Description: Store last sort/filter state in localStorage so it persists across page loads
+- Why it matters: Minor convenience — avoids resetting sort every refresh
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: unmapped
+- Notes: Trivial to add post-v1
+
+## Out of Scope
+
+### R030 — OAuth / SSO integration
+- Class: anti-feature
+- Status: out-of-scope
+- Description: Centralized auth via OAuth/SSO providers
+- Why it matters: Prevents massive scope increase. Reverse proxy handles AuthN; media.rip handles AuthZ via session mode + admin auth
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: Authentik, Authelia, Traefik ForwardAuth are the operator's tools for this
+
+### R031 — WebSocket transport
+- Class: anti-feature
+- Status: out-of-scope
+- Description: WebSocket for real-time communication
+- Why it matters: SSE covers 100% of actual needs (server-push only). WebSocket adds complexity without benefit
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: SSE is simpler, HTTP-native, auto-reconnecting via browser EventSource
+
+### R032 — User accounts / registration
+- Class: anti-feature
+- Status: out-of-scope
+- Description: User registration, login, password reset
+- Why it matters: Anonymous-first identity model. Session isolation provides multi-user support without accounts
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: Would fundamentally change the product shape
+
+### R033 — Automatic yt-dlp update at runtime
+- Class: anti-feature
+- Status: out-of-scope
+- Description: Auto-update yt-dlp extractors inside running container
+- Why it matters: Breaks immutable containers and reproducible builds. Version drift between deployments
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: Pin version in requirements; publish new image on yt-dlp releases via CI
+
+### R034 — Embedded video player
+- Class: anti-feature
+- Status: out-of-scope
+- Description: Play downloaded media within the web UI
+- Why it matters: Adds significant frontend complexity, licensing surface for codecs, scope creep. Files go to Jellyfin/Plex anyway
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: Serve files at predictable paths; users open in their preferred player
+
+### R035 — Subscription / channel monitoring
+- Class: anti-feature
+- Status: out-of-scope
+- Description: "Set it and forget it" channel archiving
+- Why it matters: Fundamentally different product — a scheduler/archiver vs a download UI. Tools like Pinchflat, TubeArchivist do this better
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: Architecture should not block adding it later. APScheduler already present for purge
+
+### R036 — FlareSolverr / Cloudflare bypass
+- Class: anti-feature
+- Status: out-of-scope
+- Description: Cloudflare bypass via external FlareSolverr service
+- Why it matters: Introduces external service dependency, legal gray area, niche use case
+- Source: research
+- Primary owning slice: none
+- Supporting slices: none
+- Validation: n/a
+- Notes: cookies.txt upload (R008) solves authenticated content for most users
+
+## Traceability
+
+| ID | Class | Status | Primary owner | Supporting | Proof |
+|---|---|---|---|---|---|
+| R001 | core-capability | active | M001/S01 | none | unmapped |
+| R002 | core-capability | active | M001/S01 | M001/S03 | unmapped |
+| R003 | core-capability | active | M001/S02 | M001/S03 | unmapped |
+| R004 | continuity | active | M001/S02 | none | unmapped |
+| R005 | primary-user-loop | active | M001/S03 | none | unmapped |
+| R006 | core-capability | active | M001/S03 | M001/S01 | unmapped |
+| R007 | differentiator | active | M001/S02 | M001/S03 | unmapped |
+| R008 | core-capability | active | M001/S04 | none | unmapped |
+| R009 | operability | active | M001/S04 | none | unmapped |
+| R010 | differentiator | active | M001/S05 | none | unmapped |
+| R011 | differentiator | active | M001/S05 | none | unmapped |
+| R012 | constraint | active | M001/S05 | M001/S03 | unmapped |
+| R013 | primary-user-loop | active | M001/S03 | none | unmapped |
+| R014 | operability | active | M001/S04 | none | unmapped |
+| R015 | failure-visibility | active | M001/S04 | none | unmapped |
+| R016 | operability | active | M001/S02 | none | unmapped |
+| R017 | continuity | active | M001/S04 | none | unmapped |
+| R018 | primary-user-loop | active | M001/S04 | none | unmapped |
+| R019 | core-capability | active | M001/S01 | none | unmapped |
+| R020 | constraint | active | M001/S06 | all | unmapped |
+| R021 | launchability | active | M001/S06 | none | unmapped |
+| R022 | launchability | active | M001/S06 | none | unmapped |
+| R023 | operability | active | M001/S01 | M001/S04 | unmapped |
+| R024 | core-capability | active | M001/S01 | none | unmapped |
+| R025 | core-capability | active | M001/S03 | none | unmapped |
+| R026 | launchability | active | M001/S06 | none | unmapped |
+| R027 | primary-user-loop | deferred | none | none | unmapped |
+| R028 | failure-visibility | deferred | none | none | unmapped |
+| R029 | primary-user-loop | deferred | none | none | unmapped |
+| R030 | anti-feature | out-of-scope | none | none | n/a |
+| R031 | anti-feature | out-of-scope | none | none | n/a |
+| R032 | anti-feature | out-of-scope | none | none | n/a |
+| R033 | anti-feature | out-of-scope | none | none | n/a |
+| R034 | anti-feature | out-of-scope | none | none | n/a |
+| R035 | anti-feature | out-of-scope | none | none | n/a |
+| R036 | anti-feature | out-of-scope | none | none | n/a |
+
+## Coverage Summary
+
+- Active requirements: 26
+- Mapped to slices: 26
+- Validated: 0
+- Unmapped active requirements: 0
diff --git a/.gsd/milestones/M001/M001-CONTEXT.md b/.gsd/milestones/M001/M001-CONTEXT.md
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+# M001: media.rip() v1.0 — Context
+
+**Gathered:** 2026-03-17
+**Status:** Ready for planning
+
+## Project Description
+
+media.rip() is a self-hostable web-based yt-dlp frontend distributed as a Docker container. Users paste any yt-dlp-supported URL, select format/quality from live extraction, and download media — no account, no telemetry, no terminal. Ground-up build targeting the gaps every competitor (MeTube, yt-dlp-web-ui, ytptube) leaves open: session isolation, real theming, mobile UX, and operator-first configuration.
+
+## Why This Milestone
+
+This is the only milestone. M001 delivers the complete v1.0 product — from first line of code through Docker distribution. The product cannot ship partially; a download tool without real-time progress, or with progress but no session isolation, or with isolation but no admin panel, would be an incomplete product that fails to differentiate from existing tools.
+
+## User-Visible Outcome
+
+### When this milestone is complete, the user can:
+
+- Run `docker compose up` and access a fully functional download UI at :8080 with cyberpunk theme, zero configuration
+- Paste any yt-dlp-supported URL, pick format/quality from live extraction, and download to /downloads
+- See real-time progress (percent, speed, ETA) via SSE, surviving page refreshes
+- Use isolated session mode (default) so two browsers see only their own downloads
+- Upload cookies.txt for paywalled content, scoped to their session
+- Switch between cyberpunk, dark, and light themes — or drop a custom theme into /themes
+- Access admin panel via username/password login to manage sessions, storage, purge, and config
+- Deploy securely using the provided reverse-proxy + TLS compose example
+
+### Entry point / environment
+
+- Entry point: `docker compose up` → http://localhost:8080 (dev), https://media.example.com (prod behind reverse proxy)
+- Environment: Docker container, browser-accessed
+- Live dependencies involved: yt-dlp (bundled library), ffmpeg (bundled binary), SQLite (embedded)
+
+## Completion Class
+
+- Contract complete means: all API endpoints respond correctly, yt-dlp downloads succeed, SSE streams deliver events, session isolation works, admin auth rejects unauthorized requests, purge deletes correct files, themes apply correctly
+- Integration complete means: frontend ↔ backend SSE flow works end-to-end, yt-dlp progress hooks bridge to browser progress bars, admin config changes take effect live, theme volume mount → picker → apply chain works
+- Operational complete means: Docker image builds for both architectures, CI runs on PR, CD publishes on tag, health endpoint responds, startup TLS warning fires when appropriate
+
+## Final Integrated Acceptance
+
+To call this milestone complete, we must prove:
+
+- Paste a YouTube URL in the browser → pick quality → see real-time progress → file appears in /downloads (the full primary loop)
+- Open two different browsers → each sees only its own downloads (session isolation)
+- Admin login → change a config value → effect visible without container restart
+- Drop a custom theme folder into /themes volume → restart → appears in theme picker → applies correctly
+- `docker compose up` with zero config → everything works at :8080 with cyberpunk theme and isolated mode
+- Tag v0.1.0 → GitHub Actions builds and pushes amd64 + arm64 images to both registries
+
+## Risks and Unknowns
+
+- **Sync-to-async bridge correctness** — yt-dlp is synchronous, FastAPI is async. ThreadPoolExecutor + `call_soon_threadsafe` is the known-correct pattern, but getting the event loop capture and progress hook wiring wrong produces silent event loss or blocked loops. Must be proven in S01
+- **SSE disconnect handling** — CancelledError swallowing creates zombie connections. sse-starlette handles this but the generator must use try/finally correctly. Must be proven in S02
+- **SQLite write contention** — WAL mode + busy_timeout handles this for the expected load, but must be enabled at DB init before any schema work. Addressed in S01
+- **CSS variable contract is a one-way door** — Token names cannot change after operators write custom themes. Must be designed deliberately in S05, not evolved by accident
+- **cookies.txt security** — CVE-2023-35934 requires pinning yt-dlp >= 2023-07-06. Cookie files are sensitive — never log, store per-session, delete on purge
+- **Admin auth over cleartext** — If operator doesn't use TLS, admin credentials sent in cleartext. Mitigated by startup warning + secure deployment docs, but can't be prevented from the app side
+
+## Existing Codebase / Prior Art
+
+- `PROJECT.md` — comprehensive product spec with data models, API surface, SSE schema, config schema, Dockerfile sketch, CI/CD outline
+- `.planning/research/ARCHITECTURE.md` — system diagram, component boundaries, data flow paths, anti-patterns, Docker layering strategy
+- `.planning/research/FEATURES.md` — feature landscape, competitor analysis, dependency graph, edge cases, MVP definition
+- `.planning/research/STACK.md` — pinned versions for all dependencies, integration patterns, known pitfalls per library
+- `.planning/research/PITFALLS.md` — critical pitfalls with prevention strategies and warning signs
+- `.planning/research/SUMMARY.md` — executive summary of all research with confidence assessments
+
+> See `.gsd/DECISIONS.md` for all architectural and pattern decisions — it is an append-only register; read it during planning, append to it during execution.
+
+## Relevant Requirements
+
+- R001-R006 — Core download loop (URL → format → progress → queue → playlist)
+- R007 — Session isolation (the primary differentiator)
+- R003, R004 — SSE transport + replay (the technical enabler for isolation)
+- R014 — Admin panel with secure auth (trust proposition)
+- R010-R012 — Theme system (visual identity + operator customization)
+- R021-R022 — Docker distribution + CI/CD (the delivery mechanism)
+- R020 — Zero telemetry (hard constraint on all slices)
+
+## Scope
+
+### In Scope
+
+- Complete backend: FastAPI app with all API endpoints, yt-dlp integration, SSE, sessions, admin, purge, config, health
+- Complete frontend: Vue 3 SPA with download queue, format picker, progress, playlist UI, mobile layout, admin panel, theme picker
+- Three built-in themes + drop-in custom theme system
+- Cookie auth (cookies.txt per-session)
+- Session export/import
+- Unsupported URL reporting
+- Docker packaging + CI/CD
+- Secure deployment documentation
+
+### Out of Scope / Non-Goals
+
+- OAuth/SSO, user accounts, WebSocket, embedded player, auto-update yt-dlp, subscription monitoring, FlareSolverr (see R030-R036)
+- TLS termination inside the container (reverse proxy responsibility)
+- Telegram/Discord bot (v2+ extension point)
+- Arr-stack API integration (v2+)
+
+## Technical Constraints
+
+- Python 3.12 (not 3.13 — passlib breakage)
+- yt-dlp as library, not subprocess (structured progress hooks, no shell injection)
+- YoutubeDL instance created fresh per job — never shared across threads
+- ThreadPoolExecutor only (not ProcessPoolExecutor — YoutubeDL not picklable)
+- SQLite with WAL mode, synchronous=NORMAL, busy_timeout=5000 — enabled before any schema work
+- SSE via sse-starlette (not FastAPI native — better disconnect handling)
+- APScheduler 3.x (not 4.x alpha)
+- bcrypt 5.0.0 direct (not passlib — unmaintained, Python 3.13 breakage)
+- All fonts/assets bundled — zero external CDN requests
+
+## Integration Points
+
+- **yt-dlp** — library import, ThreadPoolExecutor workers, progress hooks via call_soon_threadsafe
+- **ffmpeg** — installed in Docker image, found by yt-dlp via PATH for muxing
+- **sse-starlette** — EventSourceResponse wrapping async generators
+- **APScheduler AsyncIOScheduler** — started in FastAPI lifespan, shares event loop
+- **aiosqlite** — connection pool via FastAPI Depends, WAL mode
+- **GitHub Actions** — CI (lint/test on PR) + CD (build/push on tag)
+- **GHCR + Docker Hub** — image registry targets
+
+## Open Questions
+
+- **Reverse proxy for deployment example** — Caddy vs Traefik. Leaning Caddy for simplicity (one-liner TLS). Decide during S06 planning
+- **First-boot admin UX** — How pushy should the forced credential change prompt be? Decide during S04 planning
+- **HTTP/2 for SSE connection limit** — SSE has 6-connection-per-domain limit on HTTP/1.1. Caddy handles HTTP/2 automatically if chosen as reverse proxy. Confirm approach during S06
diff --git a/.gsd/milestones/M001/M001-ROADMAP.md b/.gsd/milestones/M001/M001-ROADMAP.md
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+# M001: media.rip() v1.0 — Ship It
+
+**Vision:** Deliver a complete self-hostable yt-dlp web frontend as a Docker container. Paste a URL, pick quality, download — with session isolation, real-time progress, a cyberpunk default theme, secure admin panel, and zero telemetry. Distributed via GHCR + Docker Hub for amd64 + arm64.
+
+## Success Criteria
+
+- User can `docker compose up` with zero config and get a working download UI at :8080 with cyberpunk theme and isolated session mode
+- User can paste any yt-dlp-supported URL, select format/quality from live extraction, and download to /downloads with real-time progress
+- Two different browsers see only their own downloads (session isolation works)
+- Page refresh preserves queue state via SSE replay
+- Admin can log in with username/password, manage sessions/storage/config, trigger manual purge
+- Custom theme dropped into /themes volume appears in picker and applies correctly
+- Mobile layout (375px) uses bottom tabs, card list, ≥44px touch targets
+- Tag v0.1.0 triggers CI/CD pipeline that pushes multi-arch images to both registries
+- Container makes zero automatic outbound network requests
+
+## Key Risks / Unknowns
+
+- **Sync-to-async bridge** — yt-dlp is synchronous; FastAPI is async. The ThreadPoolExecutor + `call_soon_threadsafe` pattern is well-documented but must be wired correctly or progress events are silently lost
+- **SSE zombie connections** — CancelledError swallowing in SSE generators creates memory leaks. Must use try/finally and explicitly handle cancellation
+- **CSS variable contract lock-in** — Token names are a one-way door once custom themes exist. Must be designed deliberately before components reference them
+- **Admin auth over cleartext** — Can't prevent operators from skipping TLS, but can warn loudly at startup
+
+## Proof Strategy
+
+- Sync-to-async bridge → retire in S01 by proving yt-dlp progress events arrive in an asyncio.Queue via call_soon_threadsafe, with a test that runs a real download and asserts events were received
+- SSE zombie connections → retire in S02 by proving SSE endpoint cleanup works on client disconnect (generator finally block fires, queue removed from broker)
+- CSS variable contract → retire in S05 by establishing the token set before any component references it, with documentation freeze
+- Admin auth security → retire in S04 by proving bcrypt comparison, timing-safe check, security headers, and TLS detection warning all function correctly
+
+## Verification Classes
+
+- Contract verification: pytest for backend (API, services, models), vitest for frontend (stores, components), ruff + eslint + vue-tsc for lint/type-check
+- Integration verification: real yt-dlp download producing a file, SSE events flowing from progress hook to browser EventSource, admin config write taking effect without restart
+- Operational verification: Docker image builds for both architectures, health endpoint responds, startup TLS warning fires when appropriate
+- UAT / human verification: visual theme check, mobile layout feel, admin panel UX flow, first-boot credential setup
+
+## Milestone Definition of Done
+
+This milestone is complete only when all are true:
+
+- All six slices are complete with passing verification
+- The full primary loop works end-to-end: URL → format picker → real-time progress → completed file
+- Session isolation proven with two independent browsers
+- Admin panel accessible only via authenticated login with bcrypt-hashed credentials
+- Three built-in themes render correctly; drop-in custom theme chain works
+- Mobile layout functions at 375px with correct breakpoint behavior
+- Docker image builds and runs for amd64 + arm64
+- CI/CD pipeline triggers correctly on PR and tag
+- Zero outbound network requests from container verified
+- Secure deployment example (reverse proxy + TLS) documented and functional
+
+## Requirement Coverage
+
+- Covers: R001-R026 (all 26 active requirements)
+- Partially covers: none
+- Leaves for later: R027 (presets), R028 (GitHub issue prefill), R029 (filter persistence)
+- Orphan risks: none
+
+## Slices
+
+- [ ] **S01: Foundation + Download Engine** `risk:high` `depends:[]`
+  > After this: POST a URL to the API → yt-dlp downloads it to /downloads with progress events arriving in an asyncio.Queue. Format probe returns available qualities. Config loads from YAML + env vars. SQLite with WAL mode stores jobs. Proven via API tests and a real yt-dlp download.
+
+- [ ] **S02: SSE Transport + Session System** `risk:high` `depends:[S01]`
+  > After this: Open two browser tabs → each gets its own SSE stream scoped to their session cookie. Live progress events flow from yt-dlp worker threads through SSEBroker to the correct session's EventSource. Refresh a tab → SSE replays current state. Health endpoint responds. Proven via real SSE connections and session isolation test.
+
+- [ ] **S03: Frontend Core** `risk:medium` `depends:[S02]`
+  > After this: Full Vue 3 SPA in the browser: paste URL, pick format from live extraction, watch progress bar fill, see completed files in queue. Playlists show as collapsible parent/child rows. Mobile layout (375px) uses bottom tabs, card list, ≥44px targets. Desktop uses sidebar + table. Proven by loading the SPA and completing a download flow.
+
+- [ ] **S04: Admin, Auth + Supporting Features** `risk:medium` `depends:[S02]`
+  > After this: Admin panel requires username/password login (bcrypt). Session list, storage view, manual purge, live config editor, unsupported URL log download all functional. Cookie auth upload works per-session. Session export/import produces valid archive. File link sharing serves completed downloads. Security headers present on admin routes. Startup warns if TLS not detected. Proven via auth tests + admin flow verification.
+
+- [ ] **S05: Theme System** `risk:low` `depends:[S03]`
+  > After this: Cyberpunk theme renders with scanlines/grid overlay, JetBrains Mono, #00a8ff/#ff6b2b. Dark and light themes are clean alternatives. CSS variable contract documented in base.css. Drop a custom theme folder into /themes volume → restart → appears in picker → applies correctly. Built-in themes heavily commented as documentation. Proven by theme switching and custom theme load.
+
+- [ ] **S06: Docker + CI/CD** `risk:low` `depends:[S01,S02,S03,S04,S05]`
+  > After this: `docker compose up` → app works at :8080 with zero config. `docker-compose.example.yml` includes Caddy/Traefik sidecar for TLS. Tag v0.1.0 → GitHub Actions builds multi-arch image → pushes to GHCR + Docker Hub → creates GitHub Release. PR triggers lint + test + Docker smoke. Zero outbound telemetry verified. Proven by running the published image and completing a full download flow.
+
+## Boundary Map
+
+### S01 → S02
+
+Produces:
+- `app/core/database.py` → aiosqlite connection pool with WAL mode, job CRUD operations
+- `app/core/config.py` → ConfigManager: YAML + env var merge, typed config access
+- `app/models/job.py` → Job Pydantic model, JobStatus enum, ProgressEvent model
+- `app/models/session.py` → Session Pydantic model
+- `app/services/download.py` → DownloadService: ThreadPoolExecutor, enqueue(), progress hook producing ProgressEvent into a callback
+- `app/core/sse_broker.py` → SSEBroker: per-session Queue map, put_nowait(), subscribe()/unsubscribe()
+
+Consumes:
+- nothing (first slice)
+
+### S01 → S03
+
+Produces:
+- `app/routers/downloads.py` → POST /api/downloads, GET /api/downloads, DELETE /api/downloads/{id}
+- `app/routers/formats.py` → GET /api/formats?url= (live yt-dlp extraction)
+- `app/models/job.py` → Job, ProgressEvent (JSON schema for frontend TypeScript types)
+
+### S01 → S04
+
+Produces:
+- `app/core/database.py` → job/session/config table access
+- `app/core/config.py` → ConfigManager (admin writes extend this)
+- `app/services/download.py` → DownloadService.cancel()
+
+### S02 → S03
+
+Produces:
+- `app/routers/sse.py` → GET /api/events (EventSourceResponse per session)
+- `app/middleware/session.py` → SessionMiddleware: auto-creates mrip_session httpOnly cookie, populates request.state.session_id
+- `app/routers/health.py` → GET /api/health
+- `app/routers/system.py` → GET /api/config/public (sanitized config for frontend)
+- SSE event contract: init, job_update, job_removed, error event types with typed payloads
+
+Consumes from S01:
+- `app/core/sse_broker.py` → SSEBroker.subscribe(), SSEBroker.put_nowait()
+- `app/core/database.py` → job queries for SSE replay
+- `app/models/job.py` → Job, ProgressEvent models
+- `app/models/session.py` → Session model
+
+### S02 → S04
+
+Produces:
+- `app/middleware/session.py` → SessionMiddleware (session identity for admin to list)
+- `app/core/database.py` → session table queries
+
+### S03 → S05
+
+Produces:
+- Vue component structure referencing CSS custom properties (--color-bg, --color-accent-primary, etc.)
+- `frontend/src/stores/theme.ts` → theme store with setTheme(), availableThemes
+- Component DOM structure that themes must style correctly
+
+Consumes from S02:
+- SSE event contract (EventSource integration in Pinia sse store)
+- GET /api/config/public (session mode, default theme)
+- Session cookie (auto-set by middleware)
+
+### S04 → S06
+
+Produces:
+- `app/routers/admin.py` → all admin API endpoints
+- Admin auth middleware (HTTPBasic + bcrypt)
+- `app/services/purge.py` → PurgeService
+- Test suite for admin routes
+
+Consumes from S02:
+- Session middleware, session queries
+- SSEBroker (for purge_complete event)
+
+Consumes from S01:
+- Database, ConfigManager, DownloadService
+
+### S05 → S06
+
+Produces:
+- `frontend/src/themes/` → cyberpunk.css, dark.css, light.css (baked into build)
+- `app/core/theme_loader.py` → ThemeLoader scanning /themes volume
+- `app/routers/themes.py` → GET /api/themes manifest
+- CSS variable contract in base.css (the stable theme API)
+
+Consumes from S03:
+- Vue component structure (components reference CSS custom properties)
+- Theme store (setTheme, availableThemes)
+
+### All → S06
+
+S06 consumes the complete application from S01-S05:
+- All backend source under `backend/app/`
+- All frontend source under `frontend/src/`
+- All test suites
+- All theme assets
+- docker-compose.yml, Dockerfile, GitHub Actions workflows