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Changelog

All notable changes to the AetherCode Execution Engine are documented here.

This project follows Keep a Changelog and uses semantic versioning.

[0.1.0] — 2026-10-04

First open-source release.

Added

  • Gateway — HTTP ingest (POST /api/v1/execute), SSE delivery (GET /api/v1/stream), logging / CORS / client-IP middleware, and Prometheus metrics + pprof.
  • Queue — Redis 7 Streams with a DualConsumer (weighted submit:run), a reclaimer via XAUTOCLAIM, poison-message dead-lettering, and an orphan reaper.
  • Worker — language-aware compile (with caching) and per-test run for C, C++, Java 21, Go, Python 3, JavaScript, and SQLite; verdict normalization with trailing-whitespace tolerance.
  • Sandbox — go-judge client with per-language compile/run command builders and CPU/memory/output limits.
  • Persistence — PostgreSQL 18 as the system of record, embedded migrations guarded by an advisory lock, tenant RLS, and idempotency.
  • Auth — optional OIDC (Zitadel) JWT validation with tenant/user auto-provisioning and a TTL resolution cache.
  • Rate limiting & admission — sliding-window per-user limits plus a queue-depth admission gate.
  • Releases & tooling — AGPL-3.0 license, Makefile, root and go-judge Dockerfiles, docker-compose.yml full dev stack, deploy/ systemd unit + env example, and .github/workflows/ci.yml (build, vet, gofmt, go test -race, golangci-lint).
  • Tests — hermetic unit tests for the judge, event log, client-IP parsing, config validation, and the rate limiter (in-process miniredis).

Verified

  • Zero lost jobs at up to 5,000 concurrent connections / 15,000 submissions (see docs/benchmark-results.md).

[Unreleased]

Added

  • Per-request checker field on POST /api/v1/execute (exact | token | float).

Removed — BREAKING

  • Migration 007 drops legacy problem bank tables (problems, problem_versions, test_cases), obsolete columns submissions.problem_version_id and submissions.mode, and the legacy 4-column idempotency index idx_submissions_idempotency.
  • POST /api/v1/execute no longer accepts mode or problem_version_id; the engine is a pure executor. Requests with mode other than run, or with any problem_version_id, now get 400 instead of being silently ignored; a leftover "mode":"run" is tolerated.
  • tests is always required (at least one). Callers that used mode: submit must now send their own tests.
  • Idempotency keys are no longer scoped by mode: the same key and user returns the original job ID.
  • Every new job receives a stream_token (previously only unauthenticated run-mode jobs).
  • Per-test results now always include full stdout/stderr and previews (no hidden-test masking).
  • Migration 006 clears the idempotency key on later duplicates that reused a key across run/submit (the oldest row keeps it).
  • Upgrade order: move callers off mode: submit (send tests) before deploying this release.
  • Unauthenticated DELETE /api/v1/submissions/{id} requires stream_token; the 404 for an unknown problem version is gone.

Changed

  • Requests accept time_limit_ms and memory_limit_kb; runs also get a wall-clock limit (2x CPU + 1 s).
  • VERDICT results include the complete stdout/stderr; test data up to 8 MB, output up to 8 MB.
  • Job deadline grows to the worst case of its tests and limits instead of cutting off late tests.
  • Unauthenticated requests are no longer rate limited by IP; AC_TRUST_PROXY is removed.
  • Output comparison treats CRLF and lone CR as line breaks.