# Implementation Plan: Discussion Takes & Timeline Branching

## Phase 1: Backend Support for Timeline Branching [checkpoint: 4039589]
- [x] Task: Write failing tests for extending the session state model to support branching (tree-like history or parallel linear "takes" with a shared ancestor). [fefa06b]
- [x] Task: Implement backend logic to branch a session history at a specific message index into a new take ID. [fefa06b]
- [x] Task: Implement backend logic to promote a specific take ID into an independent, top-level session. [fefa06b]
- [x] Task: Conductor - User Manual Verification 'Phase 1: Backend Support for Timeline Branching' (Protocol in workflow.md)

## Phase 2: GUI Implementation for Tabbed Takes [checkpoint: 9c67ee7]
- [x] Task: Write GUI tests verifying the rendering and navigation of multiple tabs for a single session. [3225125]
- [x] Task: Implement a tabbed interface within the Discussion window to switch between different takes of the active session. [3225125]
- [x] Task: Add a "Split/Branch from here" action to individual message entries in the discussion history. [e48835f]
- [x] Task: Add a UI button/action to promote the currently active take to a new separate session. [1f7880a]
- [x] Task: Conductor - User Manual Verification 'Phase 2: GUI Implementation for Tabbed Takes' (Protocol in workflow.md)

## Phase 3: Synthesis Workflow Formatting [checkpoint: f0b8f7d]
- [x] Task: Write tests for a new text formatting utility that takes multiple history sequences and generates a compressed, diff-like text representation. [510527c]
- [x] Task: Implement the sequence differencing and compression logic to clearly highlight variances between takes. [510527c]
- [x] Task: Conductor - User Manual Verification 'Phase 3: Synthesis Workflow Formatting' (Protocol in workflow.md)

## Phase 4: Synthesis UI & Agent Integration [checkpoint: 253d386]
- [x] Task: Write GUI tests for the multi-take selection interface and synthesis action. [a452c72]
- [x] Task: Implement a UI mechanism allowing users to select multiple takes and provide a synthesis prompt. [a452c72]
- [x] Task: Implement the execution pipeline to feed the compressed differences and user prompt to an AI agent, and route the generated synthesis to a new "take" tab. [a452c72]
- [x] Task: Conductor - User Manual Verification 'Phase 4: Synthesis UI & Agent Integration' (Protocol in workflow.md)

## Phase: Review Fixes
- [x] Task: Apply review suggestions [2a8af5f]