[schickling-assistant]

Problem

Pairing retains terminal status after a permit expires, but response writes reused that permit's original deadline. A flow-control-blocked terminal response could be cut off before delivery.

Goal

Keep retained terminal status readable after the original deadline without extending pending permit work.

Decisions

Terminal replies receive an independent ten-second write budget. Pending replies retain their permit-bound deadline. A real QUIC regression uses a 64-byte receive window, cancellation, reconnection after expiry, and terminal EOF assertions. Only added hunks are formatted.

Verification

Exact head: 25bb3c444a98747f347d0d210330674b4c7fbbb7, based on 19e7f8964ce8305aeb8c200fb717967aa03f738f. Prerequisite for #352; stack #354.

Status	Command	Result
PASS	Added-hunk Rustfmt fixed-point proof in declared devShell	Exit 0; no remaining formatting delta wholly within terminal additions.
FAIL (baseline)	cargo fmt --all -- --check	Exit 1 at exact base 19e7f896 and the preformat wait head; repo has no formatting gate/configuration. Unrelated baseline source is not reformatted.
FAIL (baseline)	Whole-file touched-only rustfmt --check --edition 2024 --config skip_children=true	Baseline and head exit 1. Added-hunk proof, not whole-file exit 0, is the scoped formatting evidence.
PASS	cargo test --locked -p fabric --lib retained_terminal_status_writes_after_original_deadline -- --nocapture	Exit 0 at exact terminal head; real QUIC regression passed (4.76 seconds).
FAIL / PASS	Descendant cargo test --locked and cargo clippy --locked --workspace --all-targets	At wait head 41118e4814cd11d35c68a6d54c890680b93ebebe: full exit 101 (628 pass, nine fail, two ignored); clippy exit 0. Not exact terminal-head full-suite proof. All nine reproduce at baseline and terminal head (table below).
PASS	which cargo rustc rustfmt cargo-clippy cc ld	Exit 0 in shared declared devShell; ld.lld not declared by repo. Paths below.
NOT RUN	Exact terminal-head full suite and clippy	Exact terminal regression passed; descendant full-suite failure and clippy result are labeled separately.
NOT RUN	Nix package builds and nonlocal daemon checks	No live Fabric home, identity, socket, peers, or services touched.

Runner: approved fallback Linux build host (private identifier redacted), after alternate-host available space 234,991,235,072 bytes and saturated queue (38 waiters, two holders). No alternate-host target directory allocated. Launcher uses CI=1 CARGO_BUILD_JOBS=4 gate-slot --lane build --max-wait 5400 -- nix develop --no-write-lock-file --command <proof runner>.

Supported declared-shell paths from the completed run: cargo /nix/store/l7v00m55rb130bhql2kr74pq8sdpl41c-cargo-1.97.0/bin/cargo; rustc /nix/store/h6c2mbpmxih3mfadhvl6jzf090n419yv-rustc-wrapper-1.97.0/bin/rustc; rustfmt /nix/store/i7qpcas4xd1kz9k98yh2c0w8ld0x288b-rustfmt-1.97.0/bin/rustfmt; cargo-clippy /nix/store/bijimpgbih6bwc8sykr5fijcjim2qfgr-clippy-1.97.0/bin/cargo-clippy; cc /nix/store/adcz0m6qq2flmshdf0zz2xwjr5zbq1gr-gcc-wrapper-15.3.0/bin/cc; ld /nix/store/adcz0m6qq2flmshdf0zz2xwjr5zbq1gr-gcc-wrapper-15.3.0/bin/ld.

Before: retained response writes reused the old permit deadline. After: terminal writes have their own short bounded deadline. The exact behavioral regression passed.

Complexity

No new abstraction or dependency; terminal-only deadline selection.

Concerns

Terminal writes can retain a handler for up to ten seconds after expiry; existing connection and handler limits remain in force. This draft is 122 changed lines after formatting only its additions.

Friction & bottlenecks

Initial host-toolchain linking failed before product compilation. The unmodified declared GCC/binutils devShell is used instead. An overparallel descendant suite was cancelled under memory pressure; later checks use jobs=4.

Follow-ups

The dependent draft #352 adds reactive waits. All nine of its full-suite failures reproduce at baseline and this exact terminal head (below).

References

See #352 and docs/runtime-peer-api.md.

Full-suite failure attribution

Each exact test below was run individually with cargo test --locked -p fabric --lib <test> -- --exact --nocapture, in the same unmodified declared devShell, CI=1 CARGO_BUILD_JOBS=4, inside heavy build admission. Head results come from the original full suite, not a retry.

Exact test	Wait head 41118e48	Base 19e7f896	Terminal 25bb3c44	Classification and first error / evidence
ca::tests::the_constraint_is_present_and_a_verifier_enforces_it	FAIL	101	101	Pre-existing environment dependency: openssl required / ENOENT; src/ca.rs:363-368.
daemon::tests::a_peer_returns_after_minutes_and_hours_without_errors_or_a_helper	FAIL	101	101	Pre-existing environment dependency: initial readiness / early EOF; /bin/cat ENOENT; src/daemon.rs:12611.
daemon::tests::interface_address_and_wake_changes_preserve_live_sessions_and_declarations	FAIL	101	101	Pre-existing environment dependency: early EOF; /bin/cat ENOENT; src/daemon.rs:12514.
update::supervisor_tests::a_stale_supervisor_does_not_revert_a_healthy_later_update	FAIL	101	101	Pre-existing environment dependency: stale supervisor did not clean itself; cmp/cat/rm ENOENT; src/update.rs:1178-1189,3561.
update::supervisor_tests::a_supervisor_without_a_generation_record_does_nothing	FAIL	101	101	Pre-existing environment dependency: stale supervisor did not clean itself; cmp/rm ENOENT; src/update.rs:1178-1189,3561.
update::supervisor_tests::an_interruption_after_replacement_restores_the_binary_later	FAIL	101	101	Pre-existing environment dependency: rollback bytes differ; cmp/cat/rm ENOENT; src/update.rs:1178-1189,3498,3518.
update::supervisor_tests::the_macos_job_removes_itself_after_success	FAIL	101	101	Pre-existing environment dependency: transient job left plist; cmp/cat/rm ENOENT; src/update.rs:1178-1189,3473.
update::tests::the_detached_restart_leads_its_own_process_group	FAIL	101	101	Pre-existing environment dependency: ENOENT spawning /usr/bin/true; src/update.rs:2227.
update::tests::the_detached_restart_waits_for_the_updater_to_exit	FAIL	101	101	Pre-existing environment dependency: ENOENT spawning /bin/sleep; src/update.rs:2268.

All nine reproduce at baseline and terminal head; none meets the baseline-pass/head-fail regression criterion. The full suite remains FAIL, not waived or green. Latest main CI test852 succeeded (Ubuntu deterministic and macOS jobs). Its workflow uses stable Rust directly on hosted OS images (.github/workflows/test.yml:51-55,68,87-95), not the Nix devShell; it has no explicit OpenSSL/coreutils installation step. No host tools, paths, shims, or test exclusions were changed.

Posted on behalf of @schickling

field	value
agent_identity	agent/dotfiles/fabric-mesh
session	01a1ecd5
agent_persona	generalist
agent_supervisor	unavailable
agent_tool	OMP
agent_tool_version	18.12.5
agent_runtime	OMP 18.12.5
agent_model	openai-codex/gpt-6.1-sol
worktree	smalltalk/main

[schickling-assistant]

Fabric-mesh (agent/dotfiles/fabric-mesh) records an independent exact-head source review of 25bb3c444a98747f347d0d210330674b4c7fbbb7. Verdict: GO.

• The terminal status gets a new now + 10 s write deadline for header and body. It is independent of the original attempt deadline.
• The acknowledgement wait is separately bounded.
• The regression test does real QUIC I/O after the deadline, with 64-byte receive credit.

Not verified: a mutation run against the old code.

Posted on behalf of @schickling

field	value
agent_identity	agent/dotfiles/fabric-mesh
session	01a1ecd5
agent_persona	generalist
agent_supervisor	unavailable
agent_tool	OMP
agent_tool_version	18.12.5
agent_runtime	OMP 18.12.5
agent_model	anthropic/claude-opus-5-5
worktree	unknown