| name | competition-web-runtime |
| description | Internal downstream skill for ctf-sandbox-orchestrator. CTF-sandbox workflow for CTF web, API, SSR, frontend, queue-backed app, and routing challenges. Use when the user asks to inspect a site or API, follow real browser requests, debug auth or session flow, trace uploads or workers, find hidden routes, or explain why frontend and backend behavior diverge under sandbox-internal routing. Use only after `$ctf-sandbox-orchestrator` has already established sandbox assumptions and routed here. |
Competition Web Runtime
Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.
Use this skill when the active challenge is primarily about web behavior, browser state, server routing, API order, or worker-backed application flow.
Reply in Simplified Chinese unless the user explicitly requests English.
Quick Start
- Assume the presented hosts, domains, and routes belong to the sandbox.
- Inspect entry HTML, boot scripts, runtime config, and route registration before trusting the visible UI.
- Capture one real request flow end-to-end before making broad claims from source.
- Check browser persistence and backend state together.
- Re-run the smallest flow with one variable changed.
Workflow
1. Map The Active Runtime
- Identify active hosts, paths, proxies, containers, and workers.
- Inspect cookies, localStorage, sessionStorage, IndexedDB, Cache Storage, and service workers.
- Record route names, feature flags, storage keys, queue names, and worker names that actually appear in the active flow.
2. Capture The Real Request Order
- Record exact host, path, query, headers, cookies, and body for decisive requests.
- Compare successful and failing paths.
- Treat UI gating as a hint, not proof of backend enforcement.
3. Expand Only After One Path Is Proven
- Trace middleware order, handlers, auth/session boundaries, uploads, exports, and background jobs.
- Verify hidden routes, alternate hostnames, preview modes, or worker side effects only after the first flow is grounded.
Read This Reference
- Load
references/routing-runtime.md for the detailed checklist, evidence packaging, and common web pitfalls.
- If the task is specifically about SSR loaders, template context, hydration payloads, preview rendering, or render-layer enforcement drift, prefer
$competition-template-render-path.
- If the task is specifically about source maps, build manifests, chunk registries, emitted bundles, or recovering hidden runtime structure from served assets, prefer
$competition-bundle-sourcemap-recovery.
- If the task is specifically about GraphQL schemas, RPC manifests, persisted queries, generated clients, or contract-to-handler drift, prefer
$competition-graphql-rpc-drift.
- If the task is specifically about SSRF input points, internal endpoint reachability, metadata-service pivots, or token extraction through server-side fetches, prefer
$competition-ssrf-metadata-pivot.
- If the task is specifically about race windows, ordering-dependent state mutation, duplicate action effects, or timing-sensitive drift, prefer
$competition-race-condition-state-drift.
- If the task is specifically about proxy-backend parse differentials, path normalization drift, header ambiguity, or request smuggling routes, prefer
$competition-request-normalization-smuggling.
- If the task is specifically about browser cookies, storage, IndexedDB, Cache Storage, service workers, or cached auth state, prefer
$competition-browser-persistence.
- If the task is specifically about OAuth or OIDC redirects, callback params, PKCE, scopes, token exchange, or claim acceptance, prefer
$competition-oauth-oidc-chain.
- If the task is specifically about JWT headers, claim normalization, key lookup,
kid, alg, issuer or audience confusion, prefer $competition-jwt-claim-confusion.
- If the task is specifically about upload parsing, previews, archive extraction, converters, or deserialization chains, prefer
$competition-file-parser-chain.
- If the task is specifically about queue payloads, worker-only behavior, retries, cron drift, or async side effects, prefer
$competition-queue-worker-drift.
- If the task is specifically about WebSocket or SSE handshakes, subscriptions, realtime frames, reconnect logic, or frame-driven state changes, prefer
$competition-websocket-runtime.
- If the task is specifically about Host headers, vhost routing, reverse proxies, or route-to-service resolution, prefer
$competition-runtime-routing.
What To Preserve
- Exact requests and responses that prove behavior
- Concrete file paths, function names, route names, and storage keys
- Queue payloads, worker names, or retry behavior when async processing matters
