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Projects/Serena/v1.5.1
Release / / with v1.3.0, v1.5.0

Serena v1.5.1

Find declarations, implementations and diagnostics while exploring a codebase.

All of Serena

Before you upgrade to v1.5.1

2 to fix

Replace project-level `base_modes` with `added_modes` to add modes; project configurations can no longer override base modes.

Action requiredChoose contexts, modes and enabled tools for a coding workflow.Affects: Projects setting `base_modes` in `project.yml`.
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`interactive` and `editing` now belong to `base_modes` rather than `default_modes`.

Behavior changedChoose contexts, modes and enabled tools for a coding workflow.Affects: Users changing default modes.
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Java symbol tools include Lombok-generated methods by default; `lombok_show_generated` can disable them.

Behavior changedFind named symbols, file outlines and references across a codebase.Affects: Java projects using Lombok.
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TypeScript can resolve cross-package references with `additional_workspace_folders`.

Behavior changedNavigate and edit code in a project containing multiple programming languages.Affects: TypeScript projects spanning packages.
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References use `mem:<name>` and update on rename; `serena memories` can list, read, write and check references. Onboarding asks whether to proceed and seeds a memory-maintenance entry; a global entry takes precedence.

Behavior changedSave project knowledge in memory files and read it in later conversations.
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Remove calls and tool-list entries for `check_onboarding_performed`; onboarding status is supplied in the project activation message.

Action requiredSave project knowledge in memory files and read it in later conversations.Affects: Custom clients or configurations using the deleted tool.
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`search_for_pattern` accepts `multiline` for multiline matching.

Behavior changedSearch project files with regular expressions and read or replace file content.
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What changed in v1.5.1

New LSP tools expose declarations, implementations and diagnostics, while memory references use `mem:<name>`. Project mode settings change and the separate onboarding-check tool is removed.

Also: Link project memories, inspect code with JetBrains, and add support for web, Ada, Godot and CUE projects.

Serena v1.3.0–v1.5.1; uv and applicable language dependencies. The v1.5.1 hotfix restores onboarding.

New things you can do

Fixed and improved

Disconnecting an HTTP/SSE client no longer partially shuts down the agent and dashboard.

Now worksConnect an LLM client to project navigation, editing and optional shell tools through MCP.
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Elixir monorepos with a nested `mix.exs` avoid startup deadlocks; Clojure monorepos discover sibling-module source paths.

Now worksFind named symbols, file outlines and references across a codebase.
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Onboarding can load its memory-maintenance template again after the v1.5.0 regression.

Now worksSave project knowledge in memory files and read it in later conversations.
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Seeded by @iluxav with Codex, from the release's public sources. Each change links to its evidence.