feat(wr-agent): the wakefulness service, ported from the OQ19 measurements by joelmoss · Pull Request #215 · joelmoss/workroom

joelmoss · 2026-09-21T09:36:20Z

Part of #208 (the wakefulness service). Stacked on #214 (the OQ19 measurements); merge that first.

What this does

Ports the measured busy/idle policy (OQ19, P4, vcs/scripts/oq19/results/frozen.json) into wr-agent as a
service that runs while detached, and publishes it.

wakefulness.rs / wakefulness/sample.rs: the frozen P4 classifier, boundary.md's counting
boundary, the ceiling state machine, a /proc reader on CLOCK_MONOTONIC (never /proc/uptime),
pty byte counters, and the service thread. Only the /proc reader and the loop are Linux-gated, so
the golden replay runs on a Mac.
Golden contract: all ten fixtures under vcs/scripts/oq19/golden/ replay to exactly their
expected.jsonl (compressed 4b/7 at window 3 s / grace 1 s). The Python mutation check is ported:
blunting cpu, pty, net or grace breaks fixture 5.
Verdict file <socket>.wake, BUSY <monotonic>\n, tmp+rename each tick, removed on clean exit.
Staleness stays reader-side (a stopped classifier cannot say so itself).
Protocol: Service::Status = 0x04 (the byte reserved in Phase 1; no wire change).
PROTOCOL_VERSION is 4 and MIN_STATUS_VERSION = 4, so a client can refuse to send Status to an
agent that would drop it silently, as MIN_FILE_VERSION does for File. status and keep requests;
an unsolicited awake_ceiling_prompt event on stream 0. Flags --awake-ceiling (default 4 h),
--awake-prompt-timeout (10 min), --ask-at-awake-ceiling (off: advisory-only, per OQ22), each
falling back to WORKROOM_SESSION_AWAKE_CEILING, WORKROOM_SESSION_AWAKE_PROMPT_TIMEOUT,
WORKROOM_SESSION_ASK_AT_AWAKE_CEILING=1, because the serve that attach self-spawns gets no flags and (renamed under WORKROOM_SESSION_ on feat(macapp): show the agent's busy/idle verdict and prompt at the awake ceiling #216, so the agent's existing scrub keeps them out of every shell)
the app controls that path only through the environment.
Wake mask: a tick gap of 30 s or more is a resume; rate windows are cleared and CPU and net are
ignored for 3 s. Pty, keystrokes, nanosleep, sockets and the exec lifecycle keep voting. Derived
from the measured sleeps (79 to 424 s) versus the measured starvation (under 15 s).
Two departures from the Python, documented in the module: sockets come from /proc/net/tcp* rather
than an ss fork (the frozen policy never compares socket age; the fork cost ~0.75% of a core per Hz),
and the agent's own descendants are NOT excluded in production (they are the work).

Measured idle cost

Linux container (rust:1.96-slim, Docker Desktop, Apple Silicon), agent serving with no clients, 120 s:

processes	no connection	one ESTAB socket
~5	0.46% of one core	0.43%
~505	1.76%	2.55%

The plan's gate is 0.5%: met on a realistic box, missed under the 500-process stress case; about half the
Python sampler's cost. The provider re-measure is owed. A live check in the same container: quiet box
IDLE, one backgrounded sleep 300 flips it BUSY within a second, IDLE again 35 s after the kill.

Validation

cargo test --manifest-path vcs/Cargo.toml: 324 passed before the review; after it, wr-agent alone is 207 lib + 55 integration on macOS, and the wakefulness (26), input (21) and status (3) tests pass on Linux in a rust:1.96-slim container (17 wakefulness unit tests incl. the golden
replay; tests/status_service.rs drives Status over a real connection).
cargo fmt --check and cargo clippy --workspace --all-targets -- -D warnings clean (CI's Rust gate).
Pty tests fail inside the command sandbox (forkpty: Operation not permitted); pre-existing, unrelated;
all runs above with the sandbox off.

Not in this PR

The app side: showing BUSY/IDLE and the ceiling prompt. That is feat(macapp): show the agent's busy/idle verdict and prompt at the awake ceiling #216, stacked on this.
The far-side shim that reads <socket>.wake (Phase 3).
A real Claude Code trace (TODOS.md).
Pre-existing Linux-only unused-import warning at wr-agent/src/file.rs:33, left alone.

Independent review (2026-09-22)

Per macapp/AGENTS.md rule 3. gstack /review: five specialists (testing, maintainability, security, performance, simplification), a red team, three Claude adversarial passes and three Codex adversarial passes plus a Codex structured review, over three fix cycles. The third cycle still produced edits, so the review is recorded as not converged; what remains is listed under "Accepted" below.

Fixed in d3fd87e, 94178a5, dcc2c25 (each with a test):

Ask mode's Suppressed state had no exit a user could reach: only a genuine IDLE or the prompt card's keep. A user who woke the box and typed was hibernated under, repeatedly. A keystroke the input classifier calls the user's own now answers a pending or expired prompt, and a resume resets the ceiling (sleep is not awake time). OQ22's entry in the design doc records the amendment.
Every client write counted as a keystroke, so a TUI polling its terminal renewed the 10 s grace forever on a detached session. Gated on the input classifier's acted; the classifier also learned DECRPM (CSI ? … $ y), which it had called the user.
Session leaders were excluded from every vote per boundary.md. A leader at its prompt votes through no signal (the ten golden fixtures replay exactly without the exclusion), and with it a leader that IS the work (a command session's execed program, a shell looping in a script) burned a core and read IDLE. Exclusion removed; recorded as a departure from the Python in the module doc.
The shim's self-call mask zeroed CPU as well as net; masked bytes still sat in the net window and voted the tick a mask ended; the tick after a mask measured the last masked second for both CPU and net; the resume path cleared fresh pty output. Each fixed and pinned.
serve removed the verdict file while the service thread could still rename a fresh one into place; an accept failure skipped the removal; a panicking service thread died silently with running: true. retire_verdict stops the writer first under one lock, runs on every exit path and on a panic, and running is set under the same guard.
The ceiling prompt was sent from the tick thread with blocking writes, before the tick's state was published, one listener after another. Sent after publication, one thread per listener.
--awake-ceiling / --awake-prompt-timeout accepted nan, inf and non-positive values; the tick after a slow sample was scheduled in the past; a process with a non-UTF-8 byte in its name vanished; a backwards wall-clock step dropped the self-call mask (now a bounded allowance); sessions.list() did two /proc readlinks per session under the store lock every second; EXCLUDED_COMMS was a third hand-typed copy; the pty counters cost a lock and a clock read per read on macOS.
verdict_written in the status reply says whether the last verdict reached the file, so a full disk is not a BUSY badge that protects nothing.
Tests: keep over the wire proves it flagged the service thread; a request on stream 0 is proven dropped; settings validation; every fix above.

Accepted, with the reason:

Same-user trust: any same-user peer can keep, evict a listener, or touch .selfcall; the .tmp name is fixed and follows symlinks. The socket directory is per bundle id under Application Support (Dev, Nightly and Release each get their own agent and files), and a peer who can write there has the user's rights already.
A prompt raised while no app is connected still arms the deadline: ask mode means an unattended box sleeps, and an app connecting during the prompt sees prompt_pending in its first status reply. There is no prompt-withdrawal event on the wire; an app must treat prompt_pending: false as withdrawn (owed to feat(macapp): show the agent's busy/idle verdict and prompt at the awake ceiling #216's follow-up).
parse_net_dev counts docker0/veth/br-* bridges: a frozen, measured signal; re-measure on a Phase 3 box (TODOS.md).
The ceiling is not persisted across an agent restart, and a panicked service thread is not restarted (it retires the verdict and reports running: false).
An idle execed leader holding a keepalive socket now votes BUSY, as a non-execed session's child already did (OQ19's D3 accepted cost).
The net window under-counts for two ticks after a mask; the shim's cadence ceiling (~8 s) is stated where the file is named.
The Swift protocolVersion is bumped on feat(macapp): show the agent's busy/idle verdict and prompt at the awake ceiling #216, the app half of this stack; feat(wr-agent): the wakefulness service, ported from the OQ19 measurements #215 alone fails AgentVCSProtocolTests against the shipped binary, as every agent-half PR in this stack has until its app half landed.

🤖 Generated with Claude Code

https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

Summary by CodeRabbit

New Features
- Added wakefulness monitoring that reports busy or idle status based on activity, with status updates available to connected applications.
- Added configurable awake-time ceilings and prompt timeouts, with optional prompts and a way to keep working. User activity or resuming the workroom resets the ceiling.
- Improved network activity tracking by excluding internal bridge traffic while accounting for default routes.
Bug Fixes
- Prevented terminal mode reports from being mistaken for user input, improving activity detection.
- Improved cleanup when serving connections fail or wakefulness monitoring stops.

coderabbitai · 2026-09-21T09:36:27Z

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macapp/WorkroomAppTests/Session/AgentControlClientTests.swift
vcs/scripts/oq19/procfs.py
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📝 Walkthrough

Walkthrough

The pull request adds Linux wakefulness sampling and classification to wr-agent, with awake-ceiling handling, verdict publishing, and status reporting. It also filters network samples by route topology, updates terminal-input classification, and records implemented behavior and follow-ups.

Changes

Wakefulness service

Layer / File(s)	Summary
Sampling and network classification `vcs/crates/wr-agent/src/wakefulness/sample.rs`, `vcs/scripts/oq19/procfs.py`, `vcs/scripts/oq19/sampler.py`, `vcs/scripts/oq19/tests/test_procfs.py`	Adds process, socket, route, and network sampling. When route data identifies uplinks, internal bridge traffic and device-less ports attached to internal bridges are excluded.
Activity classifier and awake ceiling `vcs/crates/wr-agent/src/wakefulness.rs`, `vcs/crates/wr-agent/src/wakefulness/tests.rs`	Adds activity voting, process boundaries, resume masking, ceiling states, prompt suppression, verdict files, status state, and golden-trace replay tests.
wr-agent integration and status protocol `vcs/crates/wr-agent/src/{main.rs,serve.rs,session.rs,input.rs,lib.rs}`, `vcs/crates/wr-agent/src/protocol/envelope.rs`, `vcs/crates/wr-agent/tests/status_service.rs`, `macapp/WorkroomApp/Core/Session/AgentControlClient.swift`, `macapp/WorkroomAppTests/{AgentVCSProtocolTests.swift,Session/AgentControlClientTests.swift}`	Passes wakefulness settings to the service, reports PTY activity, starts and retires the service, and dispatches `Service::Status` under protocol version 4. DECRPM terminal mode reports are excluded from user-action classification.
Recorded service behavior `docs/designs/remote-workrooms.md`, `TODOS.md`	Records service and ceiling behavior, measured costs, network-filter rationale, and remaining follow-ups.

Estimated code review effort: 4 (Complex) | ~60 minutes

Sequence Diagram(s)

sequenceDiagram
  participant ServeCommand
  participant AgentServe
  participant WakefulnessService
  participant StatusClient
  ServeCommand->>AgentServe: pass resolved wakefulness settings
  AgentServe->>WakefulnessService: start service after socket bind
  WakefulnessService->>WakefulnessService: sample activity and publish verdict
  StatusClient->>AgentServe: send Status or keep request
  AgentServe->>WakefulnessService: dispatch request
  WakefulnessService-->>StatusClient: return status or keep result

Merge Risk: 🟡 Moderate · up to 78f4d

The wakefulness service can misclassify network activity in certain routing configurations, and its documented file and timeout contracts do not match implementation. Strengthen the fixture contract and resolve these mismatches before merging.

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✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely identifies the main change: adding the wr-agent wakefulness service based on OQ19 measurements.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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From an independent review of #215 (five specialists, a Claude adversarial pass, a Codex adversarial pass and a Codex structured review): - A prompt that went unanswered put the ceiling in Suppressed and nothing a user did got it out: only a genuine IDLE or the prompt card's `keep`. A user who woke the box and typed kept the classifier BUSY while the service published IDLE, so the provider hibernated the box under them, and again after every resume. Now a keystroke the input classifier calls the user's own clears Suppressed (it is the answer the prompt never got), and a resume resets the ceiling entirely (the continuous awake period it capped has ended, and sleep is not awake time). - `count_pty_input` was called for every client write, so a TUI polling its terminal (cursor position, device attributes) renewed the 10 s grace forever on a detached session. Gated on `acted`, the classifier verdict `write_input` already computes for the size claim. - The shim's self-call mask zeroed CPU as well as net, unlike the Python it ports; a compute-only job starting during a provider call was invisible for four seconds per call. Only the resume mask silences CPU now. - Masked traffic still entered the 3 s net window and voted BUSY the tick the mask ended, holding an idle box awake 30 s after every resume. A masked tick now moves the window's base to itself. - The resume path cleared the pty output window, dropping output produced since the wake, the one signal the doc promised survives a resume. The window expires by timestamp already; the clear is gone. - `serve` removed the verdict file while the service thread could still rename a fresh one into place, leaving a file that stops changing, which its reader takes as BUSY forever with no agent left. `retire_verdict` stops the writer first, under one lock, and a panicking service thread retires it too instead of dying silently with `running: true`. - The prompt was sent to listeners from the tick thread with blocking writes; a wedged app (the likeliest reason nobody answered) would stop the verdict being rewritten. Sent from its own thread. - `--awake-ceiling` and `--awake-prompt-timeout` accepted "nan", "inf" and non-positive values, each breaking the ceiling a different way. Finite and positive, or the default. - The tick after a slow sample was scheduled in the past, so a delayed tick was followed by an immediate one. The next tick is the first strictly after now. - `/proc/<pid>/stat` was read as UTF-8, so a process with one invalid byte in its name vanished from every signal. Read as bytes, decoded lossily. - The self-call mtime check dropped the mask when the wall clock stepped back, which NTP does right after a resume. A future stamp is recent. - `sessions.list()` resolved every session's foreground program under the store lock once a second for a field the classifier never reads, and panicked on a poisoned lock. `SessionStore::pids()` instead. - `EXCLUDED_COMMS` was a third hand-typed copy of the two exclusion lists; it is derived now, and a test pins the union. - The pty counters paid a lock and a clock read per pty read on macOS for a buffer nothing drains there. No-ops off Linux; the drain swaps the buffers out under the lock rather than holding it. Tests for each; `keep` over the wire now proves it flagged the service thread; a request on stream 0 is proven dropped. TODOS.md records the container-bridge net signal (docker0/veth) as a Phase 3 re-measure rather than an unmeasured change to the frozen policy. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

greptile-apps · 2026-09-23T09:29:16Z

Confidence Score: 3/5

The PR is not yet safe to merge because an app protocol test now fails, and the wakefulness classifier can still hide active workloads based solely on mutable process names.

Findings

Process names hide workloads ▶

Fix with agent prompt

### Issue 1
vcs/crates/wr-agent/src/wakefulness.rs:258-270
A session program named or renamed to `cron` or `wr-wakeshim` is excluded solely because of its mutable `comm` value; for these names, all descendants are excluded too. After input, PTY, and network grace expire, the excluded workload cannot contribute CPU, timer, D-state, or socket activity to the BUSY decision. The agent can therefore publish IDLE while the workload is still running, allowing the provider to hibernate an active box.

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

Summary

This PR adds the Linux wakefulness classifier and Status service, publishes BUSY/IDLE verdicts, introduces awake-ceiling handling, and synchronizes the app’s advertised agent protocol version.

Ports the measured OQ19 classifier, process/network sampling, wake masking, PTY activity tracking, and verdict lifecycle into wr-agent.
Adds Status and keep requests plus awake-ceiling prompt state.
Updates the app protocol version to 4.
Recent follow-up changes remove several classifier blind spots and add lifecycle, input-classification, and cleanup protections.
One app wire-format test remains pinned to protocol version 3 and now fails.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Process, socket, network, PTY, and lifecycle samples] --> B[Wakefulness classifier]
    B --> C{Busy vote or hold window?}
    C -->|Yes| D[BUSY verdict]
    C -->|No| E[IDLE verdict]
    D --> F[Atomically publish socket.wake]
    E --> F
    B --> G[Status service state]
    G --> H[Status replies and ceiling prompts]
    H --> I[Registered app listeners]

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Inline comments:
In `@docs/designs/remote-workrooms.md`:
- Line 1845: Update the ask-mode timeout description for both app and shim
implementations to state that an unanswered prompt stops asserting BUSY,
allowing the provider idle timer to hibernate the box later; do not imply the
prompt directly hibernates the box.

In `@vcs/crates/wr-agent/src/wakefulness.rs`:
- Around line 1008-1010: Update verdict_path to append “.wake” to the complete
socket path rather than replacing its existing extension, so a socket path such
as agent.sock yields agent.sock.wake.

In `@vcs/crates/wr-agent/src/wakefulness/sample.rs`:
- Around line 170-176: Update the IPv4 default-route filters in
vcs/crates/wr-agent/src/wakefulness/sample.rs, lines 170-176, and
vcs/scripts/oq19/procfs.py, lines 86-89: skip rows whose interface is “*” and
require RTF_UP to be set with RTF_REJECT unset in the hexadecimal Flags field
before adding an interface to the uplinks set. Keep the destination and mask
checks.

In `@vcs/crates/wr-agent/src/wakefulness/tests.rs`:
- Around line 146-150: Update the fixture-count assertion in the golden fixture
test to require exactly ten fixtures instead of accepting eight or more. Keep
the existing failure message and fixture collection behavior unchanged.

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TODOS.md
docs/designs/remote-workrooms.md
vcs/crates/wr-agent/src/input.rs
vcs/crates/wr-agent/src/lib.rs
vcs/crates/wr-agent/src/main.rs
vcs/crates/wr-agent/src/protocol/envelope.rs
vcs/crates/wr-agent/src/serve.rs
vcs/crates/wr-agent/src/session.rs
vcs/crates/wr-agent/src/wakefulness.rs
vcs/crates/wr-agent/src/wakefulness/sample.rs
vcs/crates/wr-agent/src/wakefulness/tests.rs
vcs/crates/wr-agent/tests/status_service.rs
vcs/scripts/oq19/procfs.py
vcs/scripts/oq19/sampler.py
vcs/scripts/oq19/tests/test_procfs.py

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The frozen P4 policy, its counting boundary and the ceiling state machine, replaying all ten golden fixtures to exactly their recorded change-points. Only the /proc reader and the service loop are Linux-gated, so the golden replay runs on a developer's Mac and not only in CI. Two deliberate departures from the Python, both documented in the module: sockets come from /proc/net/tcp rather than an `ss` fork (the frozen policy has age: null, and the fork was measured at ~0.75% of a core per Hz against a 0.5% budget), and the agent's own descendants are NOT excluded in production (they are the work; excluding them is boundary.md's amendment-2 failure). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

…::Status The Linux service thread samples at 1 s, writes `<socket>.wake` atomically every tick (verdict plus the monotonic stamp the reader needs for the staleness rule), and fills the Status service the envelope has reserved since Phase 1. Pty bytes are counted where they already move, in the session reader and in write_input, so a DETACHED session's output still votes. OQ22 is implemented agent-side: advisory-only by default (a BUSY box past the ceiling is reported, never slept), `--ask-at-awake-ceiling` raises a prompt event on stream 0 and lets the box sleep if nobody answers, and `keep` resets the ceiling. No force-sleep anywhere. Ceiling 4 h and prompt timeout 10 min are flags, like every other setting this binary has. The app UI is out of scope; the status reply carries every field it needs. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

Names the service thread so its cost can be read from /proc/<pid>/task/<tid>/ without instrumenting the agent. Measured 2026-09-21 in a rust:1.96 container (Docker Desktop VM, Apple Silicon), agent idle with no clients, over 120 s: quiet box, 5 processes: 0.46% of one core loaded box, 505 processes: 1.76% of one core The plan's gate is 0.5% of one core, so this passes on a realistic box and misses it under the 500-process stress case — roughly half what the Python sampler cost in the same shape (median 1.03%, worst 1.48% closed loop, with the per-process walk alone at 2.5% at 500 processes). The growing term is the two /proc reads per process per second; sample.rs records what shrinking it would take. NOT measured on the provider: this is a container on a laptop. Live signal check in the same container: a quiet box reads IDLE, one backgrounded `sleep 300` flips it to BUSY within a second (wchan hrtimer_nanosleep), and it returns to IDLE 35 s after the sleep is killed. That is the design doc's headline false-idle case for the old foreground-pgid signal, and it exercises the live /proc read that no replay fixture can. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

A verdict that stops being rewritten means BUSY to its reader, which is right for a classifier that was killed and wrong for one that exited because it had nothing left to own — the box would be held awake forever by an agent that correctly decided it was idle. The file goes with the socket. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

The ceiling-prompt listener list is process-global (one box, one verdict), so unlike a connection's Subscriptions it has no teardown: strong references kept every connection the app ever opened alive and eligible for a prompt it could no longer read, and the eight-entry cap then evicted the oldest LIVE listener after eight reconnects. Weak references, pruned on every touch. Also measures the case the first cost pass missed: the socket fd walk short-circuits when the box holds no established connection, which the quiet container did. With one ESTAB socket held, over 120 s: ~6 processes: 0.43% of one core ~506 processes: 2.55% of one core So the gate (0.5%) is met on a realistic box either way, and missed under the 500-process stress case — worse with a connection held, which is exactly the D3 case the measurement says is BUSY by design. sample.rs carries the table and what shrinking either term would cost. parse_net_dev now has a test against a real /proc/net/dev capture, asserting the same totals the Python procfs.net_bytes produces from that text. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

…; record the port, its cost and what is still owed Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

…ngs fall back to the environment MIN_STATUS_VERSION lets a client refuse to send Status to an agent that would drop it silently, the way MIN_FILE_VERSION does for File. The settings read WR_AGENT_AWAKE_CEILING, WR_AGENT_AWAKE_PROMPT_TIMEOUT and WR_AGENT_ASK_AT_AWAKE_CEILING when the flag is absent, because the serve that attach self-spawns gets no flags and the app controls that path only through the environment it launches attach with. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

From an independent review of #215 (five specialists, a Claude adversarial pass, a Codex adversarial pass and a Codex structured review): - A prompt that went unanswered put the ceiling in Suppressed and nothing a user did got it out: only a genuine IDLE or the prompt card's `keep`. A user who woke the box and typed kept the classifier BUSY while the service published IDLE, so the provider hibernated the box under them, and again after every resume. Now a keystroke the input classifier calls the user's own clears Suppressed (it is the answer the prompt never got), and a resume resets the ceiling entirely (the continuous awake period it capped has ended, and sleep is not awake time). - `count_pty_input` was called for every client write, so a TUI polling its terminal (cursor position, device attributes) renewed the 10 s grace forever on a detached session. Gated on `acted`, the classifier verdict `write_input` already computes for the size claim. - The shim's self-call mask zeroed CPU as well as net, unlike the Python it ports; a compute-only job starting during a provider call was invisible for four seconds per call. Only the resume mask silences CPU now. - Masked traffic still entered the 3 s net window and voted BUSY the tick the mask ended, holding an idle box awake 30 s after every resume. A masked tick now moves the window's base to itself. - The resume path cleared the pty output window, dropping output produced since the wake, the one signal the doc promised survives a resume. The window expires by timestamp already; the clear is gone. - `serve` removed the verdict file while the service thread could still rename a fresh one into place, leaving a file that stops changing, which its reader takes as BUSY forever with no agent left. `retire_verdict` stops the writer first, under one lock, and a panicking service thread retires it too instead of dying silently with `running: true`. - The prompt was sent to listeners from the tick thread with blocking writes; a wedged app (the likeliest reason nobody answered) would stop the verdict being rewritten. Sent from its own thread. - `--awake-ceiling` and `--awake-prompt-timeout` accepted "nan", "inf" and non-positive values, each breaking the ceiling a different way. Finite and positive, or the default. - The tick after a slow sample was scheduled in the past, so a delayed tick was followed by an immediate one. The next tick is the first strictly after now. - `/proc/<pid>/stat` was read as UTF-8, so a process with one invalid byte in its name vanished from every signal. Read as bytes, decoded lossily. - The self-call mtime check dropped the mask when the wall clock stepped back, which NTP does right after a resume. A future stamp is recent. - `sessions.list()` resolved every session's foreground program under the store lock once a second for a field the classifier never reads, and panicked on a poisoned lock. `SessionStore::pids()` instead. - `EXCLUDED_COMMS` was a third hand-typed copy of the two exclusion lists; it is derived now, and a test pins the union. - The pty counters paid a lock and a clock read per pty read on macOS for a buffer nothing drains there. No-ops off Linux; the drain swaps the buffers out under the lock rather than holding it. Tests for each; `keep` over the wire now proves it flagged the service thread; a request on stream 0 is proven dropped. TODOS.md records the container-bridge net signal (docker0/veth) as a Phase 3 re-measure rather than an unmeasured change to the frozen policy. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

From the re-review of d3fd87e (Codex and Claude adversarial passes, red team): - A session leader that exec'ed into the job (a command session, or `exec cargo build`) was excluded from every vote as if it were a shell at its prompt; a single-process job burning a core read IDLE. Only leaders that ARE shells are excluded now. Every golden fixture's leader is bash, so the contract is unchanged. - The input classifier called DECRPM (`CSI ? mode ; value $ y`, a TUI's synchronized-output query answered on a timer) the user's own, which renewed the keystroke grace forever and, in ask mode, answered prompts nobody saw. It is a report now. Fix in `input.rs`, so the size claim gets it too. - A keystroke on the tick a prompt was raised or expired was lost: the ceiling was consulted before the step. It is consulted after, and a pending prompt counts as answered by typing, not only an expired one. - Bytes of the last masked second were counted a tick late and could vote once the mask ended. The first tick after a mask is masked too. - The self-call stamp's future-clock allowance was unbounded, and a masked tick now erases rather than defers, so a clock N minutes behind blinded the net signal for N minutes. Bounded to the mask's own length, and the shim's cadence ceiling is recorded where the file is named. - An accept failure returned from `serve` before the verdict was retired, leaving a frozen file: BUSY forever to its reader. Retired on every exit. - The ceiling prompt was raised before the tick's state was published, so an app answering the event with `status` could read the previous tick. Published first, one delivery thread per listener, so one stalled app cannot eat another's prompt timeout. - `retire_verdict` also removes a `.tmp` a failed rename left behind. The module doc states what a MISSING verdict file means to the reader. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

- Session leaders are no longer excluded from the candidate set. The exclusion was written for a shell at its prompt, which votes through no signal anyway (the ten golden fixtures replay exactly either way), and it hid a leader that IS the work: a shell looping in a script, or a command session's exec'ed program, burned a core and read IDLE. Both review passes reproduced it. Recorded as a departure from boundary.md in the module doc. - CPU is a delta over the last interval, so the first tick after the resume mask still measured the last masked second; the wake blip's CPU voted BUSY there and held the box 30 s. Masked one tick longer, as the net window already was. - A verdict write that fails (full disk, quota) left `status` claiming the service was asserting BUSY while the reader saw no file. `verdict_written` in the status reply says whether the last verdict reached the file. - `running` is set under the same guard the writer uses, so an agent that retired the verdict before the service's first tick cannot be reported running afterwards. - The shim's cadence ceiling was stated as ~6 s; the first accurate net sample after a touch is T+7, so it is ~8 s. The future-stamp comment now says what the bound does for a large clock step (fails awake). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

…ridge ports Every interface but lo was summed, so container chatter counted on its veths and bridge: one pg_isready a second between two containers measured 1804 B/s in Docker's VM, 3.6x the 500 B/s threshold on its own. The filter reads the kernel's classification in /sys/class/net, not interface names. A bridge port with a device (a NIC enslaved to a bridge) stays counted, so a bridged uplink never reads zero. procfs.py mirrors it for the OQ19 sampler. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crosses_the_box takes its sysfs root, so a test pins the rule that ships; the name-based closure proved only the parse. A filter that leaves nothing with traffic has dropped the uplink itself (an LXC container bridging its own veth), so every interface counts again rather than the signal reading zero forever. procfs.py mirrors the fallback. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…es by The byte fallback failed review: once any kept tunnel (tailscale0, wg0) carries a byte it switches off for good, and an LXC container bridging its own veth eth0 then reads only the tunnel's keepalives under load. The uplink is now what the kernel routes by: a bridge carrying an IPv4 or IPv6 default route counts, and so does every port on it. Only bridges no default leaves by, and their device-less ports, are dropped. procfs.py mirrors the rule. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…rface Without a default there is no telling the uplink bridge from an internal one, and an empty route read must not drop a bridged uplink. The IPv6 doc line is corrected (ipv6_route lists every table), and TODOS names the accepted residual gaps. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

This PR bumps the agent's PROTOCOL_VERSION to 4, and the client constant is documented as "bumped together", but the client bump only came with the app half (#216). So testTheClientsProtocolConstantsMatchTheShippedAgent failed on this PR alone. Advertising 4 before the Status client exists is harmless: the agent pushes Status events only to a connection that has sent a Status request. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

joelmoss mentioned this pull request Sep 21, 2026

feat(macapp): show the agent's busy/idle verdict and prompt at the awake ceiling #216

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Remote agent sessions #154

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joelmoss force-pushed the feat/agent-wakefulness-service branch from 6c49267 to 07957ad Compare September 22, 2026 21:09

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Interchangeability services: port forwarding, terminal durability, wakefulness #208

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joelmoss force-pushed the feat/agent-wakefulness-service branch from 07957ad to f5e09f8 Compare September 23, 2026 08:09

joelmoss added this pull request to stack #219 September 23, 2026 08:51

joelmoss marked this pull request as ready for review September 23, 2026 09:18

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joelmoss and others added 14 commits September 23, 2026 11:07

docs(remote-workrooms): the wakefulness service's deciding half ships…

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…; record the port, its cost and what is still owed Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GhhmRhjiSBmajC7LrFUxGV

joelmoss force-pushed the feat/agent-wakefulness-service branch from f5e09f8 to e453f35 Compare September 23, 2026 10:08

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Review follow-ups from the remote-agent stack (#201–#218) #220

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Far-side lifecycle shim: keep a busy box awake through the provider (boxd first) #257

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feat(wr-agent): the wakefulness service, ported from the OQ19 measurements - #215

feat(wr-agent): the wakefulness service, ported from the OQ19 measurements#215
joelmoss merged 15 commits into
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What this does

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