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AGENTS.md — WebCodex Repository Rules

These rules govern work on the WebCodex source repository with the current host's available tools. A deeper AGENTS.md governs its directory. Load linked domain guidance only when the task reaches that boundary. The builtin webcodex.workflow guides callers of a connected WebCodex runtime; it is not a prerequisite for local checkout work. See CONTRIBUTING.md for contributor setup and validation.

WebCodex is actively developed. Features, fixes, and reliability work are welcome, but preserve credential, process-tree, transport, durability, authority, replay-safety, and boundedness contracts.

1. Product and authority invariants

  • Protect real authority boundaries: credentials, public entry points, destructive actions, execution targets, process ownership, history, and published artifacts. Model new credential audiences, scopes, identities, leases, and replaceable targets explicitly; stale requests must not retarget or gain authority.
  • Never print, commit, or expose credentials, authorization headers, private keys, tokens, secret files, or sensitive command output.
  • Structured execution lifecycle state owns retry safety. Semantic ambiguity, authority changes, stale fences, replay uncertainty, and uncertain effects fail closed; presentation or model ergonomics never override execution authority.
  • Keep one canonical machine representation per fact or follow-up. Static/internal taxonomies and forensic bookkeeping belong in runtime types, tests, telemetry, or exceptional diagnostics rather than duplicate model-facing fields. Model-facing compatibility requires a named concrete consumer; historical aliases are not retained merely because an older implementation emitted them.
  • HTTP/MCP requests are stateless unless the exact adapter contract supplies a stable ClientWindow. Never infer Workflow Session, model-context retention, or authority from transport/audit IDs, credentials, Projects, or prior requests.
  • Keep Connector Tasks, Workflow Sessions, durable Agents/Conversations/Wakes, and Agent Tasks distinct. Persistence of identity or history is not permission to replay an effect.
  • Keep core execution and Job semantics protocol-, UI-, transport-, and OS-neutral. Host-specific behavior, including MCP App orchestration, belongs in explicit adapters.
  • Boundedness is a correctness property for model surfaces, logs, persistence, scans, queues, and retained state. Do not turn ergonomic limits into authority bypasses or silently widen resource contracts.

Product direction: docs/ARCHITECTURE.md.

2. WebCodex implementation conventions

  • Follow existing authoritative paths and naming. For cross-layer changes, complete the relevant enums, registries, schemas, adapters, persistence/recovery rules, and projections end to end; do not create a parallel representation for convenience.
  • Treat existing implementation, comments, tests, and compatibility code as evidence, not permanent product requirements. Remove obsolete adapters/configuration/tests together when their concrete consumer is gone, while preserving real wire, authority, durability, and release boundaries.
  • Retain supported published installation/data formats and named external protocol consumers; unreleased main history alone does not justify compatibility. Check the actual stable tag before pruning, and separate migration-only code from current installer/recovery duties. See docs/compatibility-policy.md.
  • Model-facing directness is exposure/ergonomics, not authority. Generic dispatch may serve an admitted tool only through the same canonical schema, authorization, permission, capability, and effect checks; hidden or unadmitted tools remain unavailable.
  • ToolSpec descriptions must be self-contained about selection, authority, effects, retries, continuation, uncertainty, and recovery. Use the available description budget when semantics require it; arbitrary brevity must not erase safety or recovery meaning.
  • Prefer one unambiguous model-visible next action. If removing a result field leaves the same business interpretation and exact next action, omit the duplicate by default. See docs/agent/tool-contract-guidelines.md.
  • Prefer host-native artifact import/export or project transfer for binary files. Do not route complete binary payloads through model-generated Base64 merely to cross a tool boundary.
  • New execution/provider integrations must preserve process-tree ownership, credential isolation, cancellation, timeout, durable Job identity, and recovery semantics rather than bypassing ToolRuntime contracts.
  • Before filing a GitHub issue, follow Reporting issues in CONTRIBUTING.md: distinguish directly reproduced facts from source-based inference or user reports, include discoverable evidence, and never invent missing environment details or a root cause.

3. Rust, tests, and validation

  • Use the dogfood Cargo profile for optimized development builds. Reserve release for formal release/publication artifacts.
  • Documentation-only changes use python3 scripts/check_markdown_links.py and diff review, not Cargo builds. Keep existing English/Chinese peers aligned under docs/MAINTENANCE.md.
  • Rust changes normally use the smallest package/focused tests that detect the changed behavior. Full workspace/library runs, --all-targets, ignored tests, real-process harnesses, and E2E are for explicit need, release/deployment, cross-cutting boundaries, broad conflict resolution, or a focused-coverage gap.
  • Treat cargo fmt as finalization after Rust source stabilizes, not a mutation-by-mutation loop. CI/release formatting remains a final-state gate.
  • Put tests in the existing domain test tree. Keep inline private-helper tests small; process/network/integration fixtures belong in dedicated modules.
  • Process fixtures must mirror production I/O ownership: absent stdin is EOF; explicit stdin is those bytes then EOF; drain/capture stdout and stderr without pipe deadlocks; never accidentally inherit the invoking terminal. Prefer child-local configuration/environment over process-global mutation.
  • For console-only or flaky failures, reproduce with one controlled boundary changed and add a deterministic regression that also fails headlessly. Retries, larger timeouts, and lower concurrency are diagnostic/resource controls, not substitutes for the demonstrated fix.
  • Distinguish current failures, pre-existing failures, expected negative cases, and failures resolved by retry. Never weaken authentication, authorization, validation, schemas, sandboxing, ownership checks, or tests merely to make validation green.
  • Public or persisted contract changes need focused compatibility/privacy/boundedness coverage. Recovery tests should prove identity/effect semantics, not only happy-path output.

Testing guidance: docs/TESTING.md.

4. Git, deployment, and release authority

  • Push, publish, tag, release, deploy, restart services, or otherwise mutate external systems only when the user explicitly authorizes that action and target.
  • Honor existing explicit authorization for the same action and target; do not ask again at each step. Runtime authority mode does not itself authorize repository publication or deployment.
  • Do not force-push, move published tags, overwrite releases, or rewrite published history without explicit authorization naming that operation and target. Failed pre-publication tag recovery is allowed only through the documented guarded reclaim path.
  • A named development/dogfood deployment is not a release. Deploy the reviewed source commit, preserve rollback, record build identity without hiding dirty state, and run focused smoke; this does not authorize version bumps, tags, or publication.
  • Release/publication must obey immutable artifact and signing/provenance contracts. Follow docs/agent/release-process.md and docs/RELEASE_CHECKLIST.md.

5. Domain sources of truth

Route detailed decisions to the owning document instead of restating those contracts here: