Enable Infinite Sessions #76

jmoseley · 2026-01-21T22:26:27Z

Allow configuration of infinite sessions and compaction thresholds.

- Add InfiniteSessionConfig type with thresholds - Add infiniteSessions option to SessionConfig - Expose workspacePath on CopilotSession - Pass config to server and capture workspace path in create/resume

- Add InfiniteSessionConfig TypedDict with thresholds - Add infinite_sessions option to SessionConfig - Expose workspace_path property on CopilotSession - Convert snake_case to camelCase for wire format

- Add InfiniteSessionConfig struct with pointer fields for optional values - Add InfiniteSessions field to SessionConfig - Add WorkspacePath() method to Session - Pass config in CreateSession and capture path in create/resume

- Add InfiniteSessionConfig class with threshold properties - Add InfiniteSessions property to SessionConfig - Add WorkspacePath property to CopilotSession - Pass config in CreateSessionAsync and capture path in create/resume

- Add InfiniteSessionConfig documentation to SessionConfig options - Document workspacePath property on CopilotSession - Add Infinite Sessions section with examples for each SDK - Document compaction events

Copilot

Pull request overview

This PR adds support for infinite sessions with automatic context compaction and workspace persistence across all language SDKs (Python, Node.js, Go, and .NET). Sessions can now automatically manage context window limits through background compaction and persist state to workspace directories.

Changes:

Added InfiniteSessionConfig type across all SDKs with configurable thresholds for background compaction and buffer exhaustion
Updated session objects to include workspace_path property that points to the session's persistent workspace directory
Modified create and resume session methods to accept infinite session configuration and return workspace paths
Added comprehensive documentation with usage examples for all supported languages

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
python/copilot/types.py	Added InfiniteSessionConfig TypedDict and infinite_sessions field to SessionConfig
python/copilot/session.py	Added workspace_path parameter and property to CopilotSession
python/copilot/client.py	Updated create_session and resume_session to handle infinite sessions config and workspace path
python/README.md	Added Infinite Sessions documentation section with Python examples
nodejs/src/types.ts	Added InfiniteSessionConfig interface and infiniteSessions field to SessionConfig
nodejs/src/session.ts	Added workspacePath parameter and getter to CopilotSession
nodejs/src/index.ts	Exported InfiniteSessionConfig type
nodejs/src/client.ts	Updated createSession and resumeSession to handle infinite sessions config and workspace path
nodejs/README.md	Added Infinite Sessions documentation section with TypeScript examples
go/types.go	Added InfiniteSessionConfig struct and InfiniteSessions field to SessionConfig
go/session.go	Added workspacePath field and WorkspacePath() method to Session
go/client.go	Updated CreateSession and ResumeSessionWithOptions to handle infinite sessions config and workspace path
go/README.md	Added Infinite Sessions documentation section with Go examples
dotnet/src/Types.cs	Added InfiniteSessionConfig class and InfiniteSessions property to SessionConfig
dotnet/src/Session.cs	Added WorkspacePath parameter and property to CopilotSession
dotnet/src/Client.cs	Updated CreateSessionAsync and ResumeSessionAsync to handle infinite sessions config and workspace path
dotnet/README.md	Added Infinite Sessions documentation section with C# examples

Comments suppressed due to low confidence (1)

go/README.md:286

The function call references Float64(0.95) but should be copilot.Float64(0.95) to be consistent with the copilot.Bool(true) on line 284. This appears to be a missing package prefix.

        BufferExhaustionThreshold:     Float64(0.95), // Block at 95% until compaction completes

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nodejs/README.md

python/copilot/client.py

go/client.go

nodejs/src/client.ts

go/README.md

friggeri

@jmoseley not going to block based on this, but please add e2e tests if you feel like that would be warranted for this feature

cookbook/dotnet/recipe/error-handling.cs

cookbook/python/recipe/error_handling.py

cookbook/python/recipe/managing_local_files.py

cookbook/python/recipe/multiple_sessions.py

cookbook/python/recipe/persisting_sessions.py

cookbook/python/recipe/pr_visualization.py

- Test compaction triggers with low thresholds (0.5%/1%) - Test session.usage_info events show token limits - Test assistant.usage events - Test no compaction events when infinite sessions disabled

The compaction trigger test requires real API calls to get realistic token counts. The replay proxy doesn't provide the token usage data needed for the CLI to trigger compaction.

The test requires a CLI build with infinite sessions support. Run locally with COPILOT_CLI_PATH pointing to a local CLI build.

Add e2e tests for context compaction to Go, Python, and .NET SDKs: - Test that compaction triggers with low thresholds and emits events - Test that no compaction events occur when infinite sessions disabled - Verify session still works after compaction (context preserved via summary) These tests mirror the existing Node.js compaction tests.

jmoseley · 2026-01-23T04:10:28Z

Added e2e tests. They won't pass until we ship the release that supports infinite sessions.

Updates CLI dependency for Node.js SDK and shared test harness to support protocol version 2 (infinite sessions).

github-actions · 2026-01-24T14:53:16Z

✅ Cross-SDK Consistency Review

I've reviewed this PR for consistency across all four SDK implementations (Node.js, Python, Go, and .NET), and I'm pleased to report that this PR maintains excellent cross-SDK consistency.

Summary

This PR adds infinite session configuration to all four SDKs, enabling automatic context compaction and workspace persistence. The feature is implemented consistently across all languages.

Detailed Analysis

✅ Type Definitions

All SDKs define the same InfiniteSessionConfig type with three fields:

Node.js: InfiniteSessionConfig with enabled, backgroundCompactionThreshold, bufferExhaustionThreshold
Python: InfiniteSessionConfig with enabled, background_compaction_threshold, buffer_exhaustion_threshold
Go: InfiniteSessionConfig with Enabled, BackgroundCompactionThreshold, BufferExhaustionThreshold
.NET: InfiniteSessionConfig with Enabled, BackgroundCompactionThreshold, BufferExhaustionThreshold (JSON names match Node.js via [JsonPropertyName] attributes)

✅ API Surface

All SDKs consistently:

Add infiniteSessions/infinite_sessions/InfiniteSessions to SessionConfig
Add workspacePath/workspace_path/WorkspacePath property to the Session class
Use the same default values (enabled: true, background: 0.80, buffer: 0.95)
Document the same behavior and workspace structure

✅ Documentation

All READMEs include:

Identical "Infinite Sessions" section with usage examples
Same compaction events documentation (session.compaction_start and session.compaction_complete)
Workspace path explanation
Examples for enabling, disabling, and customizing thresholds

✅ Testing

All SDKs include equivalent E2E tests:

CompactionTests.cs (.NET)
compaction_test.go (Go)
compaction.test.ts (Node.js)
test_compaction.py (Python)

Naming Convention Adherence

The PR correctly follows language-specific naming conventions:

Node.js/TypeScript: camelCase (e.g., backgroundCompactionThreshold)
Python: snake_case (e.g., background_compaction_threshold)
Go: PascalCase for exported fields (e.g., BackgroundCompactionThreshold)
.NET: PascalCase with JSON serialization attributes matching Node.js

Conclusion

This PR is an excellent example of maintaining feature parity across a multi-language SDK. No consistency issues were found. The implementation ensures users have the same capabilities and developer experience regardless of which SDK they choose.

Great work! 🎉

AI generated by SDK Consistency Review Agent

jmoseley added 5 commits January 21, 2026 13:50

feat(nodejs): add infinite sessions configuration

100ca24

- Add InfiniteSessionConfig type with thresholds - Add infiniteSessions option to SessionConfig - Expose workspacePath on CopilotSession - Pass config to server and capture workspace path in create/resume

feat(python): add infinite sessions configuration

30b6a6f

- Add InfiniteSessionConfig TypedDict with thresholds - Add infinite_sessions option to SessionConfig - Expose workspace_path property on CopilotSession - Convert snake_case to camelCase for wire format

feat(go): add infinite sessions configuration

24fe4d7

- Add InfiniteSessionConfig struct with pointer fields for optional values - Add InfiniteSessions field to SessionConfig - Add WorkspacePath() method to Session - Pass config in CreateSession and capture path in create/resume

feat(dotnet): add infinite sessions configuration

d10701b

- Add InfiniteSessionConfig class with threshold properties - Add InfiniteSessions property to SessionConfig - Add WorkspacePath property to CopilotSession - Pass config in CreateSessionAsync and capture path in create/resume

docs: document infinite sessions feature in all SDKs

8a85bc3

- Add InfiniteSessionConfig documentation to SessionConfig options - Document workspacePath property on CopilotSession - Add Infinite Sessions section with examples for each SDK - Document compaction events

jmoseley requested a review from a team as a code owner January 21, 2026 22:26

Copilot AI review requested due to automatic review settings January 21, 2026 22:26

Copilot started reviewing on behalf of jmoseley January 21, 2026 22:26 View session

Copilot AI reviewed Jan 21, 2026

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jmoseley added 3 commits January 21, 2026 14:40

docs: fix missing copilot. prefix in Go README example

63e2f1a

fix: wrap long line in Python docstring

c3f3366

chore: remove accidentally committed node_modules, add .gitignore

bfa9b72

patniko previously approved these changes Jan 22, 2026

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friggeri previously approved these changes Jan 22, 2026

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jmoseley dismissed stale reviews from friggeri and patniko via 40ffae5 January 23, 2026 00:54

github-code-quality bot found potential problems Jan 23, 2026

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cookbook/dotnet/recipe/error-handling.cs Fixed Show fixed Hide fixed

github-code-quality bot found potential problems Jan 23, 2026

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jmoseley force-pushed the jm/infinite branch from c8c8bb4 to e00ddb3 Compare January 23, 2026 01:12

jmoseley added 2 commits January 22, 2026 17:15

Merge main into jm/infinite

128a95b

test(nodejs): add e2e tests for compaction and usage events

f823071

- Test compaction triggers with low thresholds (0.5%/1%) - Test session.usage_info events show token limits - Test assistant.usage events - Test no compaction events when infinite sessions disabled

jmoseley force-pushed the jm/infinite branch from e00ddb3 to f823071 Compare January 23, 2026 01:17

jmoseley added 8 commits January 22, 2026 19:33

test: skip compaction trigger test in CI

21dcf41

The compaction trigger test requires real API calls to get realistic token counts. The replay proxy doesn't provide the token usage data needed for the CLI to trigger compaction.

fix(dotnet): fix syntax errors from merge conflict resolution

8d147eb

test: remove usage event tests (not part of this PR)

a75c1f4

test: enable compaction test in CI

b6fa81c

fix(dotnet): change records to internal for JSON serializer

c334859

test: skip compaction trigger test in CI until CLI is released

b49dcc6

The test requires a CLI build with infinite sessions support. Run locally with COPILOT_CLI_PATH pointing to a local CLI build.

test: revert skip - will update after CLI release

a318f06

jmoseley added 3 commits January 24, 2026 06:45

Merge origin/main into jm/infinite

701e463

fix: use %v format for float64 tokensRemoved in Go test

e1b198a

chore: update @github/copilot CLI to 0.0.394

0910f53

Updates CLI dependency for Node.js SDK and shared test harness to support protocol version 2 (infinite sessions).

jmoseley added 3 commits January 24, 2026 06:55

style: format compaction tests for all SDKs

501fe8d

fix: use dict instead of Dict in Python SDK

d4da3dc

fix: correct SessionEventType import in Python compaction test

e924316

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Enable Infinite Sessions #76

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jmoseley commented Jan 23, 2026

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github-actions bot commented Jan 24, 2026

✅ Cross-SDK Consistency Review

Summary

Detailed Analysis

✅ Type Definitions

✅ API Surface

✅ Documentation

✅ Testing

Naming Convention Adherence

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