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v6.3.0

FiloSottile/mkcertv6.3.0Aug 12, 2026by obra

AI Summary

This release focuses on enhancing subagent-driven development workflows, including improved conflict resolution that allows controllers to proceed on non-destructive plan conflicts, batch processing for small tasks, and better integration with Devin CLI and Hermes Agent.

Key Highlights

  • Controllers no longer stall on plan conflicts; only destructive actions require human approval.
  • Small same-shape tasks are now batched into one dispatch to reduce subagent costs.
  • Devin CLI plugin installation now works, with skills auto-triggering at session start.
  • Worktree removal no longer destroys untracked files, improving safety during branch finishing.
  • Pre-dispatch conflict scan records checks in the ledger for better traceability.

New Features

  • Automatic handling of non-catastrophic plan conflicts by controllers.
  • Batch dispatch system for micro-task plans.
  • Plans now carry a `Spec:` pointer to resolve conflicts against the design.
  • Devin CLI support for `devin plugins install obra/superpowers`.
  • Hermes Agent integration improvements including install from git clone.

Full Release Notes


### Harness Support

- **Devin CLI**: `devin plugins install obra/superpowers` now works, and skills auto-trigger at session start. (#1995)
- **Hermes Agent**: install from a git clone; skills register with Hermes' native loader and the bootstrap loads on the first turn. (#1922, #2025)
- **Grok Build CLI** added to the install docs. (#1919)

### Brainstorming

- **Ceremony now scales to the task.** Requests are classified as spike, bounded, or architectural; small tasks skip the two-document ritual. Every path still stops for your approval before implementation. (#2063)

### Subagent-Driven Development

- **Controllers no longer stall on plan conflicts.** Non-catastrophic conflicts and ambiguities get a recorded ruling and work continues; only destructive or irreversible actions still stop for a human. One donated session had sat blocked for almost nine hours on a question the controller could have decided. (#2077)
- **The pre-dispatch conflict scan records its checks in the ledger** instead of just asserting the plan is clean. (#2080)
- **Small same-shape tasks batch into one dispatch**, cutting subagent cost sharply on micro-task plans; batch reviews verify every file in the brief made it into the diff. (#2078)
- **Implementers and reviewers may not spawn their own subagents**, which was producing duplicate reviews. (#2059)
- **Plans carry a `Spec:` pointer** and SDD reads the spec at setup, so plan conflicts get resolved against the design instead of guessed at. (#2086)
- Reviewers re-read evidence they find illegible instead of re-running the test suite (#2089), and circuit-breaker rulings now show up in the Finish report.

### Codex

- Subagent waits are event-driven instead of poll-heavy, spawns pin model and reasoning effort explicitly, and the multi-agent reference is corrected against Codex source. (#2060, #2061, #2062)

### Finishing a Development Branch

- **Worktree removal no longer destroys untracked files.** When `git worktree remove` refuses because the tree holds uncommitted work, the skill stops, names the files, and asks — instead of reaching for `--force`. (#2016, #1223, #2024)

### Fixes

- `render-graphs.js` in writing-skills works on Windows.
- Corrected Copilot CLI backgrounding guidance for Windows. (#1929, #2006)
- `bump-version.sh` covers the Hermes manifest.

### Documentation

- README: added a table of contents and reorganized Getting Started.