Revert "feat(providers): add context compaction across harnesses"

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[maria-rcks]

Reverts #8808

---

Note

Medium Risk
Large surface-area revert across orchestration, provider contracts, and UI turn-start paths; risk is mainly regression in turn failures, Claude /compact, and context-meter behavior rather than auth or data loss.

Overview
Reverts the cross-provider context compaction feature: the shared compactThread path through ProviderService and provider adapters is removed, along with orchestration that treated /compact as a special turn, pending-compaction tracking, and synthesized thread.state.changed compaction events.

Compaction is no longer advertised or driven for Codex, Cursor, Grok, or OpenCode (slash commands, native APIs, and Codex contextCompaction → compacted mapping are dropped). Work-log compaction lines are simplified to "Context compacted" without token before/after counts, and ThreadStateChangedPayload no longer carries those fields.

Web and mobile gate the context-meter compact action to Claude (claudeAgent) and submit /compact as a normal message rather than calling a compaction API; composer menus no longer special-case hiding or gating /compact for non-Claude providers. Claude still lists /compact in provider slash commands; resume-compaction banners remain Claude-oriented.

Tests and docs are updated to match the slimmer behavior; Claude adapter tests use sendTurn with /compact instead of compactThread.

^{Reviewed by Cursor Bugbot for commit 57f0867. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Revert context compaction across provider harnesses

• Removes the compactThread operation from ProviderService and all provider adapters (Claude, Codex, OpenCode) and session runtimes, along with native compaction routing and fallback compaction logic
• Removes compact-command handling from the ProviderCommandReactor turn-start handler, including in-progress state, empty-conversation rejection, and blocking of subsequent turns; messages containing the compact command now follow the ordinary turn-send path
• Removes beforeTokens and afterTokens fields from the ThreadStateChangedPayload schema in providerRuntime.ts; compacted thread-state events and context-compaction activities no longer carry token counts
• Frontend ChatComposer and ChatViewContent now gate the compact-context action on the selected provider being claudeAgent rather than an advertised slash command, and show "Enable a Claude provider before compacting" when unavailable
• Removes the /compact command from provider snapshots for Codex, Cursor, Grok, and OpenCode; Claude retains an inline compact descriptor
• Behavioral Change: provider snapshots no longer advertise a compact slash command (except Claude); ThreadStateChangedPayload drops beforeTokens/afterTokens; ProviderCommandReactor no longer rejects turns during compaction or attaches request identifiers to turn-start failure activities; formatFailureDetail now formats ProviderAdapterValidationError via Cause.pretty instead of returning issue text directly; the applyProjectsProjection projector no longer deletes pending turn-start records on provider.turn.start.failed activities

^{Macroscope summarized 57f0867.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.2 KiB	13.1 KiB	−86 B (−0.6%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−2 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.3 KiB	6.3 KiB	−84 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	54.7 KiB	−822 B (−1.4%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	13.3 KiB	13.2 KiB	−154 B (−1.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	+2 B (+0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.3 KiB	−156 B (−2.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	55.5 KiB	−928 B (−1.6%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: fb93902 · PR result: 57f0867 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 109.4 KiB
• Claude decoded thread snapshot: 110.1 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.