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vmux/.planning/phases/01-session-discovery/01-01-SUMMARY.md
Pierre Martin d1c1239e1e docs(01-01): complete scaffolding + process detection plan 
- SUMMARY.md with execution results
- STATE.md advanced to plan 2/2
- ROADMAP.md and REQUIREMENTS.md updated (DISC-01, DISC-02 complete)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-23 13:26:38 +01:00

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phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed
phase plan subsystem tags requires provides affects tech-stack key-files key-decisions patterns-established requirements-completed duration completed
01-session-discovery 01 process-detection
go
proc
linux
cli
Go module scaffold (shell.nix, go.mod)
Shared types: Process, Session, SessionState
FindClaudeProcesses() scanning /proc for Claude PIDs
EncodePath() converting absolute paths to ~/.claude/projects/ folder names
01-02
02-session-state
added patterns
go-1.25
go-stdlib-os
injectable-procdir-for-testing
fake-proc-fixtures
created modified
shell.nix
go.mod
types.go
proc.go
proc_test.go
filepath.Base matching for Claude binary detection (handles full paths)
procDir parameter injection for testability (no hardcoded /proc)
Fake /proc fixtures: createFakeProc() builds temp dirs with cmdline files and cwd symlinks
Silent error skipping: permission denied and vanished processes are skipped, not fatal
DISC-01
DISC-02
2min 2026-03-23

Phase 01 Plan 01: Scaffolding + Process Detection Summary

Go module with FindClaudeProcesses() scanning /proc for active Claude Code PIDs and EncodePath() for session folder mapping

Performance

  • Duration: 2 min
  • Started: 2026-03-23T12:23:44Z
  • Completed: 2026-03-23T12:25:44Z
  • Tasks: 2
  • Files created: 5

Accomplishments

  • Go project scaffolded with NixOS shell.nix, go.mod, and shared types (Process, Session, SessionState)
  • FindClaudeProcesses() scans configurable /proc directory, filters by "claude" binary name, reads cwd via Readlink
  • EncodePath() converts paths to ~/.claude/projects/ folder format (replace / and . with -)
  • 5 tests covering normal detection, permission denied, empty proc, and path encoding edge cases

Task Commits

Each task was committed atomically:

  1. Task 1: Scaffolding projet + types partages - 12e1ba7 (feat)
  2. Task 2 RED: Failing tests for proc scanning - 81ee7dc (test)
  3. Task 2 GREEN: Implement FindClaudeProcesses and EncodePath - 166e441 (feat)

Files Created/Modified

  • shell.nix - NixOS dev environment with go and gopls
  • go.mod - Go module github.com/pieMusic/vmux
  • types.go - Shared types: Process, Session, SessionState (Working/NeedsInput/Idle/Unknown)
  • proc.go - FindClaudeProcesses() and EncodePath()
  • proc_test.go - 5 unit tests with fake /proc fixtures

Decisions Made

  • Used filepath.Base(parts[0]) for binary detection to handle full paths like /nix/store/.../claude
  • Injected procDir as parameter for full testability without mocking os functions

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

  • shell.nix was in Pierre's global gitignore; force-added with git add -f since it is project-specific

User Setup Required

None - no external service configuration required.

Next Phase Readiness

  • Types and process detection ready for plan 01-02 (JSONL session matching, state heuristics, display)
  • EncodePath enables PID-to-session folder mapping

Phase: 01-session-discovery Completed: 2026-03-23

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