tracking: retire Claude Code upstream-bug workarounds shipped in v0.35.3

[nathanschram]

Type: Tracking / audit. Source: systematic sweep of the v0.35.3 CHANGELOG for workarounds Untether ships against upstream Claude Code / Anthropic-API defects.

Goal

Catalog every Claude Code upstream-bug workaround shipped in v0.35.3, map each to its root cause + real upstream status + existing tracker, and drive each toward a proper fix so the workaround can be retired (or codified as permanent where upstream declined to fix).

Audit (every v0.35.3 Claude Code workaround → root cause → tracker)

Upstream states checked 2026-05-29.

Workaround (v0.35.3)	Root cause	Upstream status	Tracker	Verdict
Auto-continue / auto-resume (#551; lineage #167, #322)	Claude exits after tool_result without processing the turn; ResultMessage sometimes never emitted	claude-code#34142 COMPLETED (fixed); #30333 NOT_PLANNED	—	GAP → #568
Post-result idle watchdog + subcountdown + SIGTERM (#333, #470) & stuck-after-tool_result detector (#322)	stream-json hangs — process stops emitting and never exits	claude-code#39700 NOT_PLANNED	#527 (partial)	GAP → #569 (keep + escalate)
ExitPlanMode progressive cooldown / rapid-retry auto-deny (#126 lineage)	Claude re-issues control_request immediately after denial (v2.1.72–2.1.74 loop)	memory says fixed — UNVERIFIED	—	GAP → #570
Stall-suppression matrix (#481), post-result stall noise (#470), approval-pending demotion (#526), cpu_active/approval-aware copy (#494)	Claude emits no progress during legitimate long waits	n/a (Untether-side detection)	#527	tracked
ScheduleWakeup dead-wakeup shortcut (#507/#544); loop ownership (#289)	ScheduleWakeup is a no-op outside /loop dynamic; --resume doesn't restore session-scoped scheduled tasks	n/a (CLI limitation)	#289 + #374	tracked
Background-handle clear-on-first-tool_result (#544/#507)	non-terminal tool_result semantics per primitive	n/a	#374	tracked
MCP catalog proactive refresh notify_catalog_refresh + debounce (#365/#497)	Claude MCP catalog goes stale / servers disconnect mid-session	cosmetic upstream	#372 + #268	tracked
Stream-idle timeout configurable + Type-A/B classification (#438)	Anthropic API SSE stalls on long opus runs	upstream Anthropic API	#438 (closed)	keep-it mitigation; auto-retry = separate deferred enhancement (upstream-blocked)
Bash interim-delta streaming proxy (#481)	Claude Bash tool_result has no interim stdout deltas	upstream feature request	#482	tracked
config.loaded N-reparse demote (#498)	Untether-internal (not a Claude bug)	n/a	#506	tracked (internal)
ExitPlanMode plan-body re-emit / verbosity tuning (#508/#515/#510)	plan body disappears after approval (ExitPlanMode UX); concurrent-stream race	partly upstream ExitPlanMode	#510, #515	tracked (mostly Untether-side)

Genuine gaps — new investigation issues

• investigate: retire auto-continue now that upstream claude-code#34142 is fixed (keep the #30333 path) #568 — retire auto-continue's #34142 path (fixed upstream); keep the #30333 path (NOT_PLANNED)
• upstream tracking: claude-code#39700 (stream-json hangs, never exits) NOT_PLANNED — codify post-result/stuck-after-tool_result watchdog as permanent #569 — codify the post-result/stuck-after-tool_result watchdog as a permanent #39700 mitigation; preserve the SIGTERM safety net through tracking: unified predicate-based stall detector — supersede the whack-a-mole pattern across releases #527's refactor; re-escalate upstream
• investigate: is the ExitPlanMode immediate-retry-after-denial loop (#126) fixed upstream? Remove progressive-cooldown workaround if so #570 — verify whether the ExitPlanMode immediate-retry loop (Claude retries control request immediately after denial (plan mode) #126) is fixed in the targeted CLI; remove the progressive-cooldown workaround only if confirmed
• enhancement: auto-retry Type-A stream-idle timeouts (mid-generation Anthropic API stalls) — #438 follow-up #572 — Type-A stream-idle auto-retry (bug: Stream idle timeout - partial response received on long opus 4.7 plan-mode runs (upstream Anthropic API stall) #438 follow-up): bounded auto-resume on mid-generation API stalls; Type-B never retries. Upstream-blocked (Anthropic API stabilisation); ship the gate, default off

Already tracked (no new issue needed)

#527 (unified stall detector — supersedes the whole stall/post-result/wakeup whack-a-mole family), #289 (full /loop), #374 (bg-handle lifecycle), #372 + #268 (MCP catalog/disconnect), #482 (Bash interim deltas), #506 (settings caching), #510/#515 (ExitPlanMode verbosity/race).

Not retire-able (keep)

• upstream tracking: claude-code#39700 (stream-json hangs, never exits) NOT_PLANNED — codify post-result/stuck-after-tool_result watchdog as permanent #569 / claude-code#39700 + #30333 are NOT_PLANNED upstream → permanent mitigations, not removals.
• bug: Stream idle timeout - partial response received on long opus 4.7 plan-mode runs (upstream Anthropic API stall) #438 stream-idle timeout is an Anthropic-API mitigation; a configurable knob, not a workaround to delete. (Type-A auto-retry is a separate deferred enhancement, blocked on upstream Anthropic stabilisation — now filed as enhancement: auto-retry Type-A stream-idle timeouts (mid-generation Anthropic API stalls) — #438 follow-up #572.)