feat(core): Land ContextCompressionService by joshualitt · Pull Request #24483 · google-gemini/gemini-cli

joshualitt · 2026-04-01T23:45:21Z

Upstreams the ContextCompressionService from feat(core,cli): finalize context compression with batched routing thetomzohar/gemini-cli#4 (Thank you @thetomzohar!)
Refactor: Rename ContextManager to MemoryContextManager
Settings: Add experimental.generalistProfile to safely default context management hyperparameters
Misc. tidies.

Part of the work for #24482, context compression will be integrated into the context management pipeline in a follow-up.

github-actions · 2026-04-01T23:45:38Z

🧠 Model Steering Guidance

This PR modifies files that affect the model's behavior (prompts, tools, or instructions).

⚠️ Consider adding Evals: No behavioral evaluations (evals/*.eval.ts) were added or updated in this PR. Consider adding a test case to verify the new behavior and prevent regressions.
🚀 Maintainer Reminder: Please ensure that these changes do not regress results on benchmark evals before merging.

This is an automated guidance message triggered by steering logic signatures.

github-actions · 2026-04-01T23:48:15Z

Size Change: +1.04 kB (0%)

Total Size: 34.6 MB

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gemini-code-assist · 2026-04-02T02:33:44Z

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request integrates a new context compression service to improve the efficiency of the context management pipeline. It includes structural refactoring of existing context management classes, the addition of a new experimental generalist profile for better default settings, and a cleanup of configuration APIs to support more granular context control.

Highlights

ContextCompressionService: Introduced the ContextCompressionService to optimize context management by routing file content through compression levels (FULL, PARTIAL, SUMMARY, EXCLUDED).
Refactoring: Renamed ContextManager to MemoryContextManager to better reflect its role in the context management pipeline.
Configuration: Added experimental.generalistProfile setting to provide default hyperparameters for context management, optimized for general coding tasks.
API Updates: Renamed isAutoDistillationEnabled to isContextManagementEnabled across the codebase to align with broader context management features.

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Code Review

This pull request introduces a new experimental generalistProfile and a ContextCompressionService to manage agent context more efficiently. The generalistProfile provides a set of default configurations for context management, while the ContextCompressionService uses an LLM to decide whether to provide full file content, snippets, or summaries in the conversation history. Several critical issues were identified in the new compression logic, including a bug in the enabled flag logic that prevents disabling the feature, incorrect iteration over file paths in the protection logic, and multiple instances of missing input sanitization which could lead to prompt injection.

* Upstreams the ContextCompressionService from: thetomzohar#4 * Some minor tidying. * Refactor: Rename ContextManager to MemoryContextManager * Settings: Add experimental.generalistProfile to safely default context management hyperparameters

github-actions · 2026-04-02T16:12:00Z

✅ 55 tests passed successfully on gemini-3-flash-preview.

🧠 Model Steering Guidance

This PR modifies files that affect the model's behavior (prompts, tools, or instructions).

⚠️ Consider adding Evals: No behavioral evaluations (evals/*.eval.ts) were added or updated in this PR. Consider adding a test case to verify the new behavior and prevent regressions.
🚀 Maintainer Reminder: Please ensure that these changes do not regress results on benchmark evals before merging.

This is an automated guidance message triggered by steering logic signatures.

gemini-cli Bot added the area/agent Issues related to Core Agent, Tools, Memory, Sub-Agents, Hooks, Agent Quality label Apr 1, 2026

joshualitt force-pushed the jl/merge-context-compression branch 6 times, most recently from 788d705 to 12dfb33 Compare April 2, 2026 01:02

github-actions Bot mentioned this pull request Apr 2, 2026

📊 AI CLI 工具社区动态日报 2026-04-02 gsscsd/big_model_radar#120

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joshualitt force-pushed the jl/merge-context-compression branch 2 times, most recently from 2e32ca0 to 9cfdce6 Compare April 2, 2026 02:26

joshualitt marked this pull request as ready for review April 2, 2026 02:33

joshualitt requested review from a team as code owners April 2, 2026 02:33

gemini-code-assist Bot reviewed Apr 2, 2026

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Comment thread packages/cli/src/config/config.ts Outdated

Comment thread packages/core/src/context/contextCompressionService.ts Outdated

Comment thread packages/core/src/context/contextCompressionService.ts

Comment thread packages/core/src/context/contextCompressionService.ts

joshualitt force-pushed the jl/merge-context-compression branch 3 times, most recently from 8e16db8 to dcbefb4 Compare April 2, 2026 04:31

SandyTao520 reviewed Apr 2, 2026

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Comment thread packages/core/src/context/contextCompressionService.ts Outdated

SandyTao520 approved these changes Apr 2, 2026

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joshualitt added 2 commits April 2, 2026 15:43

feat(core): Land ContextCompressionService

30d28fc

* Upstreams the ContextCompressionService from: thetomzohar#4 * Some minor tidying. * Refactor: Rename ContextManager to MemoryContextManager * Settings: Add experimental.generalistProfile to safely default context management hyperparameters

address feedback

d3c4e71

joshualitt force-pushed the jl/merge-context-compression branch from c384557 to d3c4e71 Compare April 2, 2026 15:43

joshualitt temporarily deployed to internal April 2, 2026 15:43 — with GitHub Actions Inactive

joshualitt added this pull request to the merge queue Apr 2, 2026

Merged via the queue into main with commit e0044f2 Apr 2, 2026
27 of 28 checks passed

joshualitt deleted the jl/merge-context-compression branch April 2, 2026 16:36

danzaharia1 pushed a commit that referenced this pull request Apr 2, 2026

feat(core): Land ContextCompressionService (#24483)

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kalenkevich pushed a commit to kalenkevich/gemini-cli that referenced this pull request Apr 3, 2026

feat(core): Land ContextCompressionService (google-gemini#24483)

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afanty2021 pushed a commit to afanty2021/gemini-cli that referenced this pull request Apr 4, 2026

feat(core): Land ContextCompressionService (google-gemini#24483)

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warrenzhu25 pushed a commit to warrenzhu25/gemini-cli that referenced this pull request Apr 9, 2026

feat(core): Land ContextCompressionService (google-gemini#24483)

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