- Change N=1->2 split policy from down to right to establish 2 full-height columns
- Share single decision table across GUI and headless modes
- Add _full_height_pane guard to prevent half-height column splits
- Quadruple-wire default max_columns=2 and max_rows=2 across layout.py, lib.sh, and .mam.env.example
- Update unit and integration tests to enforce deterministic 2x2 grid trajectory
- Replace '--target-agent' with mandatory '--creator <session>' flag
- Add explicit rejection error for legacy '--target-agent'
- Add '--planner <session>' flag with fail-fast check when '--plan' is missing
- Implement 2-branch session validation ('is not registered' vs 'is not running')
- Update in-repo references in hooks, SKILL.md, INSTALL.md, and tests
- Add tests/test_loop_cli.py with 9 unit/contract tests
- Standardize --herdr-session as primary flag with --herdr-server alias across create_session.sh, resume_session.sh, update_yaml_resumed.sh, and stop_session.sh
- Guard HERDR_SESSION_NAME in create_session.sh from being overwritten by workspace slug defaults when explicitly provided
- Forward explicit --herdr-session from resume_session.sh to update_yaml_resumed.sh and force-update row metadata
- Add 5 new Tier 2 component tests covering CLI dry-run parsing, usage matching, default preservation, YAML serialization, and resume propagation
- Update multi-agent-mux-create/SKILL.md documentation
- Verified by autonomous multi-agent loop with unanimous PASS verdicts from Claude and Cline
- In stop_session.sh and update_yaml_resumed.sh: standardize explicit --agent option and use resolve_agent_type_from_registry to read agent type from YAML/DB state rather than brittle suffix-only regex inference.
- Update multi-agent-mux-stop/SKILL.md, multi-agent-mux-resume/SKILL.md, multi-agent-mux-create/SKILL.md, and deploy/INSTALL.md to standardize passing --agent explicitly.
- Fix J-1 in layout.py: refactor _env_int(*names, default=None) to take an explicit default parameter, eliminating the falsy-zero trap so MAM_MIN_PANE_COLS=0 is respected.
- Add regression and contract tests: test_j1_env_zero_min_cols_matches_flag_zero, test_j1_env_zero_min_rows_matches_flag_zero, test_comp_stop_agent_fallback_*, test_comp_docs_stop_examples_pass_agent.
- Verified 100% UNANIMOUS PASS from Planner claude and Reviewers claude and cline.
- I-2: add 5.0s upper-bound execution time assertion in test_bug4_headless_unobservable_fast_path to contractually guard SKS_EMPTY_GIVEUP early-exit latency
- I-3: clean up PaneInfo.focused, wire MAM_MAX_PANE_COLS/MAM_MAX_COLS environment variables and CLI --max-cols flag
- C-1: apply max_columns growth guard to headless 0x0 layouts, mirroring GUI behavior
- Promoted Planner consensus plan Rev.2 (plan-fea5f1b2.md) and unanimous PASS reports from Reviewers Claude (report-55d1a1d9.md) and Cline (report-6f18ba0f.md)
- Verified all 333 test cases pass with exit code 0
- Replace import-time LOGS_DIR cwd binding with dynamic get_logs_dir() function
- Implement PEP 562 __getattr__ and __dir__ for transparent LOGS_DIR backward compatibility
- Update audit-log callers in mqtt_common.py and registry.py to use dynamic resolution
- Add 5 regression guards in tests/test_tier1_unit.py (276/276 PASS)
- Update IMPROVEMENTS.md, VERSIONS.md, registry.md, and include plan and peer review reports
- Remove dead agent_identities read path and PyYAML import from workspace_uuid.py
- Defer eager PyYAML import in verify_session.py to lazy YAML fallback branch
- Simplify UUID resolution to 2-tier model (tier-1 own row ID -> tier-2 adapter scan)
- Clean up unused Drift D and ghost cache clearing in reconcile.sh and stop_session.sh
- Add 3 regression guards in tests/test_tier1_unit.py (266/266 PASS)
- Update IMPROVEMENTS.md, VERSIONS.md, and SKILL.md files
- Bump version to 2.0.0 across all 8 multi-agent-mux skills reflecting A-4 Phase 2 adapter architecture and Option B isolation deprecation.
- Standardize author (godopu), license (MIT), platforms, environments, and metadata blocks across all SKILL.md files.
- Option B / C-3b: Deprecate isolation.root and remove its 4 legacy consumers in lib.sh, workspace_uuid.py, verify_session.py, and stop_session.sh.
- M2~M7 Migration: Implement artifact_path, verify_artifact, purge_artifacts, spawn_spec, resume_spec, auth_ok, discover, ready_tokens, exit_key, and delegate_agent_key across BaseAgentAdapter and all 4 adapters (Claude, Agy, Hermes, Cline).
- Migrate shell duplications in lib.sh, create_session.sh, resume_session.sh, stop_session.sh, and reconcile.sh to python -m lib_py.agents facts.
- Hardening & Corrections: Fix Cline resume_spec flag to '-i --id', apply shlex.quote across all facts variables with MAM_ prefix, add safe fallback in wait_for_tui_ready.
- Add comprehensive contract tests in tests/test_a4_adapter_contract.py and sync IMPROVEMENTS.md / LOG.md.
- Verified: 100% PASS across unit, component, contract, and integration tests.
- Replace legacy s[:16]-s[-15:] truncation with 8-char SHA-1 hash suffix in sanitize.py and lib.sh to prevent workspace name collisions
- Align mock Herdr error messages in tests/conftest.py to real Herdr 0.8.0 output format
- Add missing required/invalid_agent_name to early abort regex in lib.sh
- Remove legacy heuristics in lib.sh has-session and unify mock agent lookups
- Add unit tests in tests/test_sanitize_and_mock_errors.py (256/256 passed)
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