a6176014fd fix(runner): self-restart resilience under systemd / external process supervision (#814)
* feat(runner): HAPI_DISABLE_VERSION_HANDOFF opt-out for mtime self-restart

The heartbeat in cli/src/runner/run.ts triggers spawnHappyCLI(['runner','start'])
+ process.exit(0) when getInstalledCliMtimeMs() differs from startedWithCliMtimeMs.
The same mtime guard fires in controlClient.isRunnerRunningCurrentlyInstalledHappyVersion
when a fresh CLI invocation inspects the live runner.

For operators who own process supervision (systemd, tmux, custom rebuild
pipelines, etc.), source-file mtimes shift for reasons unrelated to npm
upgrades. The clean exit defeats Restart=on-failure under systemd and
leaves the machine offline.

Setting HAPI_DISABLE_VERSION_HANDOFF=1 in the runner's environment now skips
both checks while keeping the rest of the heartbeat (session pruning, state
file persistence) intact. Default behavior is unchanged for npm consumers.

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(runner): preserve original argv across self-restart and verify handoff

The mtime-driven self-restart in cli/src/runner/run.ts spawned
`hapi runner start` with no arguments, then process.exit(0)'d
unconditionally after a 10s sleep. Two failure modes:

1. The forwarded `runner start-sync` lost the operator's --workspace-root
   flags (anything passed at the original invocation). Browse + spawn
   silently degraded to "no workspace roots".
2. If the replacement runner failed to come up at all (build was mid-flight,
   binary missing, etc.) the original runner still exited cleanly. Under
   systemd Restart=on-failure that means no runner is brought back, and
   the machine drops off the hub until manual intervention.

Changes:

- persistence.ts: add startedWithArgv?: string[] to RunnerLocallyPersistedState
- run.ts: snapshot process.argv.slice(2) at startup, persist it on initial
  state write and on every heartbeat, replay it as the new runner's argv
  (default to ['runner','start-sync'] when nothing was captured)
- controlClient.ts: new waitForRunnerHandoff(oldPid, {timeoutMs}) polls
  runner.state.json for a different live PID
- run.ts: only clearInterval + process.exit(0) when handoff is confirmed.
  On spawn failure or 30s timeout, refresh the mtime baseline (so we don't
  respawn-loop on the same drift) and stay alive so the machine keeps
  serving.

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(runner): address Codex review findings on #814

Two Major correctness fixes flagged by upstream Codex review on PR #814:

(1) Stale-mtime poisoning on failed handoff (run.ts:854,867)

The previous failure paths assigned
  startedWithCliMtimeMs = installedCliMtimeMs
which the next heartbeat persisted to runner.state.json. Downstream
isRunnerRunningCurrentlyInstalledHappyVersion() then reported the
still-stale runner as current, masking the failure until the *next*
genuine mtime change. Symptom: an mtime change that briefly failed
to hand off would be silently forgotten.

Fix: leave startedWithCliMtimeMs immutable. Gate handoff entry on
a new nextHandoffAttemptAt timestamp; failure paths bump it by
HANDOFF_RETRY_BACKOFF_MS (5 min) via deferHandoffRetry(). The
heartbeat continues to write the honest "still on the old code"
mtime, and the runner naturally re-attempts after the cooldown.

(2) HAPI_DISABLE_VERSION_HANDOFF not honored by live runner
    (controlClient.ts:192, persistence.ts)

The env var was only checked in the invoking CLI process. Under the
documented systemd use case the env is set on the service unit but
NOT on the operator's interactive shell - so a shell `hapi runner
start` would still treat mtime drift as stale and kill the supervised
runner during a rebuild. The exact regression this layer was built
to prevent.

Fix: capture HAPI_DISABLE_VERSION_HANDOFF at runner start time into
state.startedWithVersionHandoffDisabled, persisted via the heartbeat.
The controlClient mtime check now OR's the live env var with the
persisted snapshot, so any caller honours the running runner's
opt-out regardless of their own environment.

Tests: cli typecheck clean; 14/14 runner unit tests pass.
Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(runner): address Codex #814 [Major] argv-capture + handoff race

Two additional Major findings on the runner self-restart layer that
were not addressed in a49fc57:

1. run.ts:672 - process.argv.slice(2) returns ['start-sync', ...] in
   compiled binary mode (raw argv is [hapi, runner, start-sync, ...]),
   so the handoff spawned `hapi start-sync ...` which resolveCommand
   treats as an unknown top-level and falls back to Claude. Replaced
   with getCliArgs() (the project's canonical argv normalizer) plus a
   defensive guard that falls back to ['runner', 'start-sync'] if the
   captured argv does not begin with 'runner'.

2. run.ts:892 - waitForRunnerHandoff did not actually keep the old
   runner alive. The child's startRunner() unconditionally called
   stopRunner() before acquiring the lock or writing its own state,
   so the parent's /stop handler resolved shutdown and exited BEFORE
   the child committed. If the child then failed (lock contention,
   auth error, anything between stopRunner and writeRunnerState),
   the machine went offline with no runner at all.

   New handoff protocol:
   - Parent sets HAPI_RUNNER_HANDOFF_FROM_PID=<pid> on the spawned
     child's env, then releases the lock BEFORE entering
     waitForRunnerHandoff (breaks the parent-holds-lock /
     child-needs-lock-to-write-state deadlock).
   - On wait-timeout the parent re-acquires the lock (long-retry, 30s)
     and defers retry; if re-acquire fails (third party took the
     lock) the parent exits cleanly so it does not stay alive without
     the lock invariant.
   - Child detects the env signal; if state.pid matches and that pid
     is alive, this is an authorized handoff: skip stopRunner(),
     skip the version-match early-exit, and acquire the lock with a
     longer retry window (60 attempts x 500ms) so it waits through
     the parent's asynchronous release.

CLI typecheck clean. 14/14 runner unit tests still pass. The wider
46/664 failures in the CLI suite are pre-existing in this branch
(unrelated: AppServerEventConverter, cursorEventConverter, hook
server, Query) - baseline before this commit has 42+; my changes do
not regress them.

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-06-10 13:59:27 +08:00
2026-01-04 20:45:15 +08:00
2026-03-29 09:47:17 +08:00
2025-12-16 15:03:50 +08:00

HAPI

Run official Claude Code / Codex / Gemini / OpenCode sessions locally and control them remotely through a Web / PWA / Telegram Mini App.

Why HAPI? HAPI is a local-first alternative to Happy. See Why Not Happy? for the key differences.

Features

  • Seamless Handoff - Work locally, switch to remote when needed, switch back anytime. No context loss, no session restart.
  • Native First - HAPI wraps your AI agent instead of replacing it. Same terminal, same experience, same muscle memory.
  • AFK Without Stopping - Step away from your desk? Approve AI requests from your phone with one tap.
  • Your AI, Your Choice - Claude Code, Codex, Cursor Agent, Gemini, OpenCode—different models, one unified workflow.
  • Terminal Anywhere - Run commands from your phone or browser, directly connected to the working machine.
  • Voice Control - Talk to your AI agent hands-free using the built-in voice assistant.
  • Workspace Browser - Opt-in via one or more hapi runner start --workspace-root <path> flags: browse scoped file trees from the web and start sessions in allowed subdirectories.

Demo

https://github.com/user-attachments/assets/38230353-94c6-4dbe-9c29-b2a2cc457546

Getting Started

npx @twsxtd/hapi hub --relay     # start hub with E2E encrypted relay
npx @twsxtd/hapi                 # run claude code

hapi server remains supported as an alias.

The terminal will display a URL and QR code. Scan the QR code with your phone or open the URL to access.

The relay uses WireGuard + TLS for end-to-end encryption. Your data is encrypted from your device to your machine.

For self-hosted options (Cloudflare Tunnel, Tailscale), see Installation

Docs

Build from source

bun install
bun run build:single-exe

Credits

HAPI means "哈皮" a Chinese transliteration of Happy. Great credit to the original project.

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