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…enable-agent Core is gaining an --enable-agent flag and an agent_requirements.txt beside main.py, copying its own --enable-manager pattern: when the flag is set and the package is missing, core logs the pip install command, turns the flag off and keeps starting. Desktop already installs manager_requirements.txt at every point that can change an install; the launch is where the agent's file has to be installed, because nothing before it knows the flag is in play. The decision keys on the FINAL launch args, not on the PostHog grant. The flag reaches the args either from the user's own launch args or from a beta grant, and a core whose schema does not know it has already had it filtered out, so the assembled args are the only place that knows the agent is really starting. The install runs after that assembly and before the spawn, next to the manager config reconcile, and only for an install whose Desktop-managed Python environment the shared uv helper can drive - the same environment test the manager requirement sites make. It is deliberately unconditional per launch: no stamp, no hash, no new field on the installation record. uv audits an already-satisfied requirements file in about 10 ms, which is not worth the state. A failure never blocks the launch. It is reported in the launch output and the flag stays in the args, leaving core to print its own hint and disable the agent itself. Cancelling during the install cancels the launch, like every other pre-spawn step. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Two defects from a two-model review of the previous commit. The install awaited uv in front of the spawn with no deadline and no fail-open, so a stalled or very slow install stopped ComfyUI starting at all. That inverts core's own contract: core is built to start without these packages, log its install hint and disable the agent. It also went further than the user asked, because the flag can arrive from a beta grant rather than from the user's own launch args, and there is no per-launch skip. uv now runs under a controller this module owns, with a ceiling past which uv is killed and reaped and the launch proceeds with the flag still set. The launch's own signal is untouched, so a timeout continues the launch while a cancel still cancels it. The ceiling is a total, not an idle bound: uv streams nothing between "Downloading" and "Downloaded", so a slow transfer cannot be told from a stall. The neighbouring args-schema probe bounds and fails open the same way. The progress step was also lost whenever a torch repair ran first. That path arms the tracker, which freezes its phase list, so a later push never reached the steps payload and the renderer dropped the phase (it ignores progress for a phase it was never told about), leaving "Restoring GPU PyTorch" on screen for the whole install. The tracker now takes a phase discovered after arming, inserting it after the active one so the bar cannot regress and re-publishing the steps payload. The agent phase is no longer a PRE_LAUNCH_PHASES entry, which is what made the ordering load-bearing. Also corrects two comments the review found inaccurate, and silences the failure warning on a cancelled launch, matching the exit-code branch. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Included review availability: 4 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 8 reviews per hour. 📝 WalkthroughWalkthroughThe launch flow now installs agent requirements when final arguments and runtime prerequisites allow it. It adds a late progress phase, streams installation output, handles timeout and cancellation, and continues after non-cancellation failures. ChangesAgent requirements launch flow
Sequence Diagram(s)sequenceDiagram
participant Launch
participant LaunchProgressTracker
participant AgentRequirementsInstaller
participant uv
Launch->>LaunchProgressTracker: addLatePhase(AGENT_REQUIREMENTS_PHASE)
Launch->>AgentRequirementsInstaller: plan and install requirements
AgentRequirementsInstaller->>uv: run installation with mirror
uv-->>AgentRequirementsInstaller: stream output and return result
AgentRequirementsInstaller-->>Launch: complete, report failure, or cancel
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✨ Finishing Touches🧪 Generate unit tests (beta)
✨ Simplify code
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Codex review on #1559. The ceiling only asked uv to stop. killProcTree sends SIGTERM to the process group on POSIX and swallows a failed taskkill on Windows, neither awaited, while the install settles only on the child's own exit. A uv that never took the signal therefore held the launch open with no limit, which is the exact failure the ceiling was added to prevent. The wait is now bounded twice: the ceiling asks uv to stop, and a grace period later the launch stops waiting whether or not it did, reporting that it has abandoned a still-running install. The grace is armed by whichever side raised the abort, so a user cancel cannot be held open either. The install promise is settled into a value rather than awaited directly, because losing the race leaves it pending and a later rejection with nothing awaiting it would surface as an unhandled rejection. The two new tests were checked against the unfixed code: the unbounded case hangs until the runner times it out, and the within-grace case proves the grace does not cut short a uv that is on its way out. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@src/main/lib/agentRequirementsLaunch.ts`:
- Around line 161-164: Update the timeout-handling branch in the agent
requirements installation flow to inspect outcome.result.code before reporting
failure: a zero exit code during the grace period must be treated as a
successful installation, not as timed out. Preserve the warning for genuinely
unsuccessful timed-out installs, and add a fake-timer test covering successful
uv exit during the grace period.
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CodeRabbit review on #1559. The ceiling can fire while uv is already on its way out with a zero exit, and the report was branching on the timer before the exit code, so an install that genuinely succeeded was announced as skipped. Nothing behaved differently, but the launch output told the user the agent was not installed on a run that had just installed it. The exit code decides now, and the timer only chooses the wording for an install that did not succeed. Checked against the unfixed code: the new test fails with the "without it" message on a zero exit. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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TL;DR
When ComfyUI is about to launch with
--enable-agent, Desktop installs core'sagent_requirements.txtfirst, so the agent works on the run that enables it. Bounded and fail-open: it can never hold up a launch that would otherwise succeed.Why
Core is gaining an
--enable-agentflag and anagent_requirements.txtbesidemain.py, copying its own--enable-managerpattern: when the flag is set and the package is not importable, core logs thepip install -rhint, turns the flag off and starts anyway. Desktop already installsmanager_requirements.txtat every point that can change an install, but the agent's file has to go in at launch, because nothing earlier knows the flag is in play.What it does
The step keys on the final launch args, not on the PostHog flag.
--enable-agentreaches them from the user's own launch args or from a Core beta grant, and a core whose schema does not know the flag has normally had it filtered out by then, so the assembled args are the one place that knows the agent is really starting.It installs only when the final args contain
--enable-agent,<install>/ComfyUI/agent_requirements.txtexists, and the install has a Desktop-managed Python environment the shared uv helper can drive — the same uv + venv test everymanager_requirements.txtsite makes, which confines this to standalone and adopted installs. Anything else is a clean no-op and core's own hint covers those users. The install itself is the existinginstallFilteredRequirementsDetailedhelper (PyTorch lines filtered, mirror config honoured); Desktop never names a package, so the file's contents stay opaque to it.It cannot hold up a launch. uv runs under a controller this module owns with a 120 s ceiling; past it uv is killed and reaped and the launch proceeds with the flag still set, leaving core to print its hint and disable the agent itself. The launch's own abort signal is untouched, so a timeout continues the launch while a user cancel still cancels it. Failures behave the same way. The bound is a total rather than an idle one because uv streams nothing between
DownloadingandDownloaded, so a slow transfer cannot be distinguished from a stall; the deliberate consequence is that a link too slow to finish inside the ceiling falls back to core's hint.Progress appears as its own launch step, added through a new
addLatePhaseon the launch tracker. Whether the step runs is only known once the args are final, which can be after a torch repair already armed the tracker and froze its phase list, and a phase missing from the steps payload has its progress dropped by the renderer entirely.Re-running on every qualifying launch is deliberate: no stamp, no hash, no new field on the installation record. uv audits an already-satisfied requirements file in about 10 ms (measured against the uv release this repo pins, 0.11.18), which is not worth carrying state for.
Change breakdown
Total changed lines (added + deleted): 953.
src/main/lib/agentRequirementsLaunch.ts(new),src/main/lib/ipc/sessionActions/launch.ts,src/main/lib/launchProgress.ts,src/main/lib/launchPhases.tssrc/main/lib/agentRequirementsLaunch.test.ts(new),src/main/lib/ipc/sessionActions/launch.test.ts,src/main/lib/launchProgress.test.tslocales/en.json,locales/zh.jsonNo documentation, generated files, lockfiles or vendored code changed, and no merge-only changes. Tests are most of the diff because the feature is a gate: the implementation is a 176-line module plus a 27-line call site, while the behaviour worth pinning is the set of conditions under which it does and does not fire, and the two ways it must not hold up a launch.
Test coverage
Module tests (19) cover the plan decision — flag typed by hand, flag from a grant, flag absent, requirements file absent, no Desktop-managed environment, uv missing, adopted install targeting the legacy venv — and the runner: helper arguments, a non-zero exit and a thrown install both reported without throwing, silence on a cancelled launch, the ceiling abandoning a stalled install without cancelling the launch, uv killed on cancel, no timer left behind, the wait ending on its own when uv never exits after being killed, and a zero exit inside the grace period reporting as the success it was (both checked against the unfixed code, where they hang and misreport respectively).
Tracker tests (6) cover
addLatePhase: the steps payload is re-published, the new phase is entered, it lands directly after the active phase so the bar cannot regress, the real boot phases still follow, it works when nothing else injected a phase, and the caller's array is not mutated.Launch tests (9) drive the real
handleLaunchthrough the existing harness with the uv subprocess stubbed: the install fires for a hand-typed flag and a granted one; does not fire when the flag is absent, when the running core cannot parse it, when the file is absent, or when the environment is not Desktop-managed; a failed install still spawns with the flag set; the step reaches the renderer in the steps payload; and an abort during the install cancels the launch without spawning.🤖 Generated with Claude Code