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Opencode

Delegate coding tasks to OpenCode CLI agent for feature implementation, refactoring, PR review, and long-running autonomous sessions. Requires the opencode CLI installed and authenticated.

Skill metadata

Source	Bundled (installed by default)
Path	skills/autonomous-ai-agents/opencode
Version	1.2.0
Author	Hermes Agent
License	MIT
Tags	Coding-Agent, OpenCode, Autonomous, Refactoring, Code-Review
Related skills	claude-code, codex, hermes-agent

Reference: full SKILL.md

信息

The following is the complete skill definition that Hermes loads when this skill is triggered. This is what the agent sees as instructions when the skill is active.

OpenCode CLI

Use OpenCode as an autonomous coding worker orchestrated by Hermes terminal/process tools. OpenCode is a provider-agnostic, open-source AI coding agent with a TUI and CLI.

When to Use

• User explicitly asks to use OpenCode
• You want an external coding agent to implement/refactor/review code
• You need long-running coding sessions with progress checks
• You want parallel task execution in isolated workdirs/worktrees

Prerequisites

• OpenCode installed: npm i -g opencode-ai@latest or brew install anomalyco/tap/opencode
• Auth configured: opencode auth login or set provider env vars (OPENROUTER_API_KEY, etc.)
• Verify: opencode auth list should show at least one provider
• Git repository for code tasks (recommended)
• pty=true for interactive TUI sessions

Binary Resolution (Important)

Shell environments may resolve different OpenCode binaries. If behavior differs between your terminal and Hermes, check:

terminal(command="which -a opencode")
terminal(command="opencode --version")

If needed, pin an explicit binary path:

terminal(command="$HOME/.opencode/bin/opencode run '...'", workdir="~/project", pty=true)

One-Shot Tasks

Use opencode run for bounded, non-interactive tasks:

terminal(command="opencode run 'Add retry logic to API calls and update tests'", workdir="~/project")

Attach context files with -f:

terminal(command="opencode run 'Review this config for security issues' -f config.yaml -f .env.example", workdir="~/project")

Show model thinking with --thinking:

terminal(command="opencode run 'Debug why tests fail in CI' --thinking", workdir="~/project")

Force a specific model:

terminal(command="opencode run 'Refactor auth module' --model openrouter/anthropic/claude-sonnet-4", workdir="~/project")

Interactive Sessions (Background)

For iterative work requiring multiple exchanges, start the TUI in background:

terminal(command="opencode", workdir="~/project", background=true, pty=true)
# Returns session_id

# Send a prompt
process(action="submit", session_id="<id>", data="Implement OAuth refresh flow and add tests")

# Monitor progress
process(action="poll", session_id="<id>")
process(action="log", session_id="<id>")

# Send follow-up input
process(action="submit", session_id="<id>", data="Now add error handling for token expiry")

# Exit cleanly — Ctrl+C
process(action="write", session_id="<id>", data="\x03")
# Or just kill the process
process(action="kill", session_id="<id>")

Important: Do NOT use /exit — it is not a valid OpenCode command and will open an agent selector dialog instead. Use Ctrl+C (\x03) or process(action="kill") to exit.

TUI Keybindings

Key	Action
Enter	Submit message (press twice if needed)
Tab	Switch between agents (build/plan)
Ctrl+P	Open command palette
Ctrl+X L	Switch session
Ctrl+X M	Switch model
Ctrl+X N	New session
Ctrl+X E	Open editor
Ctrl+C	Exit OpenCode

Resuming Sessions

After exiting, OpenCode prints a session ID. Resume with:

terminal(command="opencode -c", workdir="~/project", background=true, pty=true)  # Continue last session
terminal(command="opencode -s ses_abc123", workdir="~/project", background=true, pty=true)  # Specific session

Common Flags

Flag	Use
run 'prompt'	One-shot execution and exit
--continue / -c	Continue the last OpenCode session
--session <id> / -s	Continue a specific session
--agent <name>	Choose OpenCode agent (build or plan)
--model provider/model	Force specific model
--format json	Machine-readable output/events
--file <path> / -f	Attach file(s) to the message
--thinking	Show model thinking blocks
--variant <level>	Reasoning effort (high, max, minimal)
--title <name>	Name the session
--attach <url>	Connect to a running opencode server

Procedure

1. Verify tool readiness:
   • terminal(command="opencode --version")
   • terminal(command="opencode auth list")
2. For bounded tasks, use opencode run '...' (no pty needed).
3. For iterative tasks, start opencode with background=true, pty=true.
4. Monitor long tasks with process(action="poll"|"log").
5. If OpenCode asks for input, respond via process(action="submit", ...).
6. Exit with process(action="write", data="\x03") or process(action="kill").
7. Summarize file changes, test results, and next steps back to user.

PR Review Workflow

OpenCode has a built-in PR command:

terminal(command="opencode pr 42", workdir="~/project", pty=true)

Or review in a temporary clone for isolation:

terminal(command="REVIEW=$(mktemp -d) && git clone https://github.com/user/repo.git $REVIEW && cd $REVIEW && opencode run 'Review this PR vs main. Report bugs, security risks, test gaps, and style issues.' -f $(git diff origin/main --name-only | head -20 | tr '\n' ' ')", pty=true)

Parallel Work Pattern

Use separate workdirs/worktrees to avoid collisions:

terminal(command="opencode run 'Fix issue #101 and commit'", workdir="/tmp/issue-101", background=true, pty=true)
terminal(command="opencode run 'Add parser regression tests and commit'", workdir="/tmp/issue-102", background=true, pty=true)
process(action="list")

Session & Cost Management

List past sessions:

terminal(command="opencode session list")

Check token usage and costs:

terminal(command="opencode stats")
terminal(command="opencode stats --days 7 --models anthropic/claude-sonnet-4")

Pitfalls

• Interactive opencode (TUI) sessions require pty=true. The opencode run command does NOT need pty.
• /exit is NOT a valid command — it opens an agent selector. Use Ctrl+C to exit the TUI.
• PATH mismatch can select the wrong OpenCode binary/model config.
• If OpenCode appears stuck, inspect logs before killing:
  • process(action="log", session_id="<id>")
• Avoid sharing one working directory across parallel OpenCode sessions.
• Enter may need to be pressed twice to submit in the TUI (once to finalize text, once to send).

Verification

Smoke test:

terminal(command="opencode run 'Respond with exactly: OPENCODE_SMOKE_OK'")

Success criteria:

• Output includes OPENCODE_SMOKE_OK
• Command exits without provider/model errors
• For code tasks: expected files changed and tests pass

Rules

1. Prefer opencode run for one-shot automation — it's simpler and doesn't need pty.
2. Use interactive background mode only when iteration is needed.
3. Always scope OpenCode sessions to a single repo/workdir.
4. For long tasks, provide progress updates from process logs.
5. Report concrete outcomes (files changed, tests, remaining risks).
6. Exit interactive sessions with Ctrl+C or kill, never /exit.