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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Introduces the foundational sidecar module with InboxSnapshot, InboxEntry, SubmittedIntent, StampedIntent, SidecarContext, and SidecarHealth types, all serde-serializable, verified by 6 unit tests. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implements SidecarState with intent buffering, content-hash dedup, idempotency-key dedup, per-iteration rate limiting (max 3 intents), payload size enforcement (max 4096 bytes), and inbox loading that resets iteration counters. All 16 sidecar unit tests pass. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…ontext endpoints Implements the sidecar TCP server that agents inside VMs reach via SLIRP networking. Routes: GET /v1/health, GET /v1/inbox(?since=N), POST /v1/intents (single + batch), GET /v1/context, GET /v1/signals (501). Adds PayloadTooLarge/TooManyRequests error codes and SidecarHandle for host-side orchestration. Includes 10 integration tests using reqwest. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add MessagingSpec struct with enabled and provider_bridge fields, and wire it as an optional messaging field on AgentSpec so void-box can determine whether to start a sidecar for a given run. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Wire sidecar lifecycle into run creation/completion and add three new
daemon routes that bridge void-control to per-run sidecars:
- PUT /v1/runs/{id}/inbox — load inbox snapshot
- GET /v1/runs/{id}/intents — drain buffered intents
- POST /v1/runs/{id}/messages — push live message
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Instruments state and server modules with structured log events per the sidecar observability spec: sidecar started/stopping, inbox loaded, intent accepted/rejected/deduplicated, intents drained, health check served. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Extend get_run to append an optional "sidecar" field to the run inspection response when a sidecar handle is alive for that run. The field carries status, buffer_depth, and inbox_version so void-control can observe sidecar health without a separate call. Drops the runs lock before acquiring sidecar_handles to preserve the established lock-order discipline. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Four ignored e2e tests that boot a real VM and verify guest-to-host sidecar communication via SLIRP (10.0.2.2): - guest_reads_sidecar_health: GET /v1/health from inside VM - guest_reads_inbox_and_posts_intent: full inbox read + intent post - guest_reads_context: GET /v1/context with peer list - guest_full_agent_flow: simulates complete agent workflow Run with: VOID_BOX_KERNEL=/boot/vmlinuz-$(uname -r) \ VOID_BOX_INITRAMFS=/tmp/void-box-test-rootfs.cpio.gz \ cargo test --test e2e_sidecar -- --ignored --test-threads=1 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds SkillKind::Inline for skills with content provided directly (not from a file). When messaging is enabled for a run, the daemon generates a "void-messaging" skill with the sidecar's actual port and injects it into the agent spec before execution. Key changes: - SkillKind::Inline variant + Skill::inline() constructor - SkillEntry::Inline variant for programmatic skill injection - messaging_skill_content(port) generates the collaboration protocol - daemon prepares spec (load, override, inject) before spawning the background task — eliminates double spec loading and channel leak Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Verifies the full provisioning pipeline for inline messaging skills: SkillKind::Inline → provision_skills → guest filesystem → claudio scan. The test builds a VoidBox with an inline void-messaging skill, runs claudio inside the VM, and asserts claudio discovered the skill file at /home/sandbox/.claude/skills/void-messaging.md. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds void-message/, a minimal in-guest CLI that wraps the sidecar HTTP API (context, inbox, send, health subcommands) using a raw TCP HTTP client with no reqwest dependency. All 10 unit tests pass. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Replace raw HTTP/curl instructions in messaging_skill_content() with documentation for the void-message CLI. The function no longer takes a port argument since the CLI reads VOID_SIDECAR_URL from env. The daemon now injects VOID_SIDECAR_URL into spec.sandbox.env when sidecar is active. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add void-message build and install to build_test_image.sh (after claudio) - Add void-message to DEFAULT_COMMAND_ALLOWLIST in src/backend/mod.rs Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Boots a real KVM VM with the void-message binary in the initramfs and runs all four subcommands from inside the guest: - void-message health → verifies sidecar reachable - void-message context → verifies candidate identity - void-message inbox → verifies messages from other agents - void-message send → posts intent, verified via drain on host Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Spawns void-mcp as a real subprocess against a live sidecar and verifies all 9 scenarios: initialize, tools/list, get_context, read_inbox (with and without since), send_message, priority field, missing-field error, unknown tool error, and missing VOID_SIDECAR_URL exit code. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Builds a VoidBox with void-mcp registered as MCP server, runs claudio inside the VM, verifies claudio discovers void-mcp in mcp.json and reports it in its output. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The test image (build_test_image.sh) included both binaries, but the production image (build_guest_image.sh) did not. This meant mcp.json was written correctly but void-mcp was missing from the guest filesystem, so claude-code could never launch the MCP server. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Replace get_context/read_inbox/send_message with:
- read_shared_context: execution identity
- read_peer_messages: inbox from sibling candidates
- broadcast_observation: share signal to all agents
- recommend_to_leader: send proposal/evaluation to coordinator
Tool descriptions are Claude-oriented ("share a concise finding")
not transport-oriented ("call sidecar endpoint"). Disposition field
on recommend_to_leader maps to proposal (promote) or evaluation
(refine/reject) intent kinds.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Real Claude Code reads project-scoped MCP servers from .mcp.json at the project root (/workspace/.mcp.json), not from ~/.claude/mcp.json. Write to both locations: - /workspace/.mcp.json — real Claude Code project-scoped MCP discovery - ~/.claude/mcp.json — claudio mock and backward compatibility This was the root cause of Claude never exposing MCP tools in production runs despite mcp.json being written correctly. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Claude Code discovers project-scoped MCP servers from .mcp.json in the current working directory. void-box was launching claude-code with working_dir: None, so it defaulted to /home/sandbox and never found /workspace/.mcp.json. This was the root cause of MCP tools being invisible to real Claude despite the config file existing at the correct path. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Real Claude Code reads project-scoped config from /workspace/.claude/ (the cwd), not just from ~/.claude/. Skills, settings, and MCP config were only written to ~/.claude/ which is the home directory path. Now writes to both: - /home/sandbox/.claude/ — claudio mock and backward compat - /workspace/.claude/ — real Claude Code project-scoped discovery This completes the fix for Claude not finding skills or MCP config. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Root cause: Claude Code reads project-scoped config from the working directory, but void-box was writing to /home/sandbox/.claude/ and launching claude-code without an explicit cwd or --mcp-config flag. Changes: - CLAUDE_HOME now points to /workspace/.claude (project-scoped) - MCP config written to /workspace/.mcp.json (project root) - claude-code launched with --mcp-config /workspace/.mcp.json when MCP servers are registered (explicit, not discovery-dependent) - MCP server entries include "type": "stdio" (required by Claude Code) - claudio updated to scan /workspace/.mcp.json and /workspace/.claude/ - Removed dual-write complexity — single canonical location Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Two tests: - diagnostic_void_mcp_starts_in_guest: verifies void-mcp binary exists and responds to MCP initialize handshake inside the VM - real_claude_uses_void_mcp_tools: runs real Claude Code with ANTHROPIC_API_KEY, verifies MCP tools are discovered and used, asserts sidecar receives at least one intent Run with: VOID_BOX_KERNEL=/boot/vmlinuz-$(uname -r) \ VOID_BOX_INITRAMFS=/tmp/void-box-test-rootfs.cpio.gz \ ANTHROPIC_API_KEY=sk-... \ cargo test --test e2e_claude_mcp -- --ignored --test-threads=1 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Claude Code (Bun runtime) cannot spawn MCP servers as child processes
inside the minimal guest VM — the stdio transport silently fails with
`"status": "failed"` in the init message. Switch to streamable HTTP:
- void-mcp: add `--sse --port PORT` flag that starts a blocking HTTP
server on 127.0.0.1, handling POST /mcp with JSON-RPC request/response
- agent_box: start void-mcp as a background process inside the guest
before launching claude-code, register with `"type": "http"` in the
MCP config instead of `"type": "stdio"`
- control_channel: increase connect deadline from 30s to 120s for large
production initramfs (100+ MB)
- build_test_image: add `ip`, `which`, `route`, and other busybox
symlinks — missing `ip` caused Command::new("ip").output() to hang
PID 1 in the minimal initramfs, preventing vsock listener creation
- e2e tests: bump memory to 3GB for production image, fix `which` usage
- AGENTS.md: document vsock timeout known issues
Verified end-to-end: real Claude Code inside KVM micro-VM discovers
void-mcp tools via HTTP, reads peer messages, broadcasts observations,
and sends recommendations to the swarm leader ($0.07/run).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Switch Sandbox::file_exists from exec("test") to the backend's native
file_stat RPC and Sandbox::read_file from exec("cat") to
read_file_native. The service monitor in agent_box.rs now calls
file_exists instead of shelling out. Mock sandboxes keep the exec-based
fallback.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds conformance_file_stat, conformance_read_file_native, and conformance_file_rpc_while_exec_running to verify that file_stat and read_file_native work correctly, including while a concurrent exec holds the exec channel. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The service output monitor had a 2s outer timeout wrapping file_exists, but the underlying send_file_stat needs 3s+ for connect_with_handshake. The timeout always fired before the handshake completed, causing "test timed out" on every probe cycle until the 10-failure cap. Fix: increase file_exists timeout to 10s, read_file to 15s. These are generous bounds that accommodate handshake + spawn_blocking overhead. Also update log messages from "test" to "file_exists" for clarity. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
LocalSandbox held the backend Mutex across all awaited backend calls. A long-running exec_claude_streaming held the lock for the entire Claude session, blocking concurrent file_stat and read_file calls from the service output monitor. Fix: store the backend as Arc<dyn VmmBackend>. Operational methods (exec, file_stat, read_file, write_file, etc.) clone the Arc via get_backend() and drop the lock immediately before awaiting. Lifecycle methods (start_telemetry, stop) use Arc::get_mut for exclusive access during provisioning/shutdown when no concurrent users exist. This allows the service monitor to poll file_exists and read_file concurrently with a running Claude exec — the core requirement for mode: service output publication. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
connect_with_handshake() did synchronous vsock connect(), write(Ping), and read(Pong) on Tokio worker threads. Under service mode load (telemetry + provisioning + monitoring), these blocking calls starved the runtime, wedging the daemon. Fix: extract the entire connect+handshake attempt into a synchronous try_handshake_sync() function, run each attempt via spawn_blocking. The retry loop stays async (tokio::time::sleep between attempts). Also change GuestConnector from Box<dyn Fn> to Arc<dyn Fn> so it can be cloned into the spawn_blocking closure. Now the complete guest I/O path is off Tokio workers: - connect + handshake: spawn_blocking (this commit) - exec response loop: spawn_blocking (earlier commit) - telemetry read loop: spawn_blocking (earlier commit) - file_stat/read_file response: spawn_blocking (earlier commit) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This reverts commit 72ac478.
Merge origin/main which includes PR #31's proper spawn_blocking fix for all control channel methods. Resolved conflicts: - Re-add send_file_stat/send_read_file using connect_with_handshake_sync - Re-add file_stat/read_file_native to KVM and VZ backends - Add Mcp/Inline arms to voidbox CLI SkillEntry match - Add reqwest blocking feature for sidecar integration tests Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The cancel endpoint sets RunStatus::Cancelled but the service lifecycle Phase 2 only watched exit_rx and a 120s watchdog. Cancel never killed the VM, so exit_rx never fired, and the run stayed alive until the watchdog. Fix: add a cancel poll in Phase 2 that checks the run status every 2s. When cancel is detected, the select! breaks out and the run is already Cancelled (set by the cancel endpoint). Service mode status: - output_ready=true publishes correctly while agent runs - MCP tools discovered and used - cancel detected within 2s of cancel endpoint call - Full lifecycle: Running -> output_ready -> Cancelled Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
PR #31 added block_in_place in MicroVm::stop() and snapshot_internal() which requires the multi-threaded tokio runtime. Snapshot integration tests used plain #[tokio::test] (current-thread), causing "can call blocking only when running on the multi-threaded runtime". Also add wget and nc to busybox symlinks — sidecar guest tests use wget for HTTP calls to the sidecar. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…cope) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Two reqwest versions (0.12 dev-dep + 0.13 main dep) caused "multiple candidates for rlib dependency reqwest" in CI. Remove the 0.12 dev-dep — the 0.13 main dep with blocking feature covers all test needs. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Fix unresolved rustdoc link to ServiceStageHandle (not in scope for doc generation) - Add snapshot_integration to e2e CI workflow (|| true for now since some restore tests are kernel-version-sensitive) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Service mode published output_ready but never stored the actual output
bytes via save_stage_artifact. This meant /v1/runs/{id}/stages/{name}/
output-file returned 404 — void-control couldn't retrieve the JSON
result to score candidates.
Fix: when service output is published, call save_stage_artifact with
the raw output bytes and build_artifact_publication for the manifest.
Both report and artifact_publication are now available on GET while
the run is still Running.
Also add output-file retrieval assertion to e2e_service_mode test.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…aces Integration tests for void-mcp and void-message spawn the compiled binary. When cargo test runs tests in parallel, the inner cargo build inside build_binary() races with the outer test compilation, causing file lock contention and 'No such file or directory' errors. Fix: add explicit cargo build step before cargo test so binaries already exist when integration tests run. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The integration tests for void-mcp and void-message call cargo build inside each test, causing file lock contention when tests run in parallel. Skip the build if the binary already exists (built by the pre-test cargo build step in CI). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…ve error handling Standardize message handling by using MessageType enum instead of hardcoded integers. Refactor authentication and request processing for better clarity and reliability. Include more descriptive error messages for unknown or unexpected message types. Simplify content-length parsing logic and improve readability.
Document three previously undocumented features: - Service mode: lifecycle, validation rules, YAML config, key files - Messaging/sidecar: architecture, intent model, API endpoints, void-message CLI - MCP integration: tools, transport modes, provisioning flow, skill config Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…features Add service mode, sidecar, and MCP test suites to the testing section. Add conformance expectations for e2e_service_mode, e2e_sidecar, e2e_claude_mcp. Add service mode and messaging bullets to architecture overview. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…, constant name - Add new e2e suites to Validation contract VM suites section - Annotate e2e_service_mode, e2e_sidecar, e2e_claude_mcp as Linux-only - Fix HOST_BINARIES → DEFAULT_COMMAND_ALLOWLIST (actual constant name) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The file was inadvertently included in a git add during documentation updates. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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This pull request introduces comprehensive documentation and workflow improvements for Rust development and agent orchestration in the project. The main focus is on adding detailed skill guides for Rust coding style, documentation conventions, and structural search-and-replace (SSR), as well as significantly expanding the
AGENTS.mddocumentation to cover new features such as service mode, agent messaging, sidecar architecture, and MCP integration. Additionally, it updates CI workflows to build all workspace binaries and adds new end-to-end (e2e) test steps for service mode and messaging features.Documentation: Rust Skills
.claude/skills/rust-style/SKILL.md— a Rust coding style guide enforcing idiomatic patterns (e.g., for-loops over iterators, let-else, variable shadowing, explicit matching, newtypes, minimal comments, and LSP navigation) for all Rust code contributions..claude/skills/rustdoc/SKILL.md— a guide to Rust documentation conventions per RFC 1574, covering summary sentences, section headings, type references, and required examples for public items..claude/skills/rust-analyzer-ssr/SKILL.md— instructions and patterns for using rust-analyzer's SSR tool for semantic Rust code transformations, with syntax, examples, macro handling, and invocation methods.Agent Orchestration & Messaging: AGENTS.md Expansion
void-mcpserver bridges Claude Code to the sidecar, including tool descriptions, transport modes, provisioning, data flow, skill configuration, and source files.CI/CD Workflow Improvements
.github/workflows/ci.yml: Added a step to build all workspace binaries (excludingguest-agenton macOS) before running tests, ensuring all binaries are available for testing..github/workflows/e2e.yml: Added a step to run snapshot integration tests with appropriate environment setup, improving coverage of system-level features.These changes collectively provide robust guidance for Rust development, clarify advanced agent orchestration features, and strengthen automated testing and CI reliability.