Hooks

Hooks are shell commands OrbCode runs at fixed points in the agent loop. Use them to block dangerous actions, auto-approve trusted ones, rewrite tool inputs, inject context into the model, format code after edits, notify yourself, or keep the agent working until a condition is met. OrbCode’s hooks follow the same contract as Claude Code’s hooks, so scripts written for Claude Code work here with two tweaks: use $MATTERAI_PROJECT_DIR (not $CLAUDE_PROJECT_DIR) and use OrbCode’s tool names (execute_command, file_edit, …) in your matchers. See Differences from Claude Code.

Hooks run arbitrary shell commands with your user’s privileges. Hooks defined by a project (.orbcode/settings.json) are disabled until you explicitly trust them. See Security.

Two-minute example

Make OrbCode block rm -rf and print the git branch on every prompt. Two steps. 1. Create a hook script at ~/.orbcode/hooks/guard.sh and make it executable:

mkdir -p ~/.orbcode/hooks
cat > ~/.orbcode/hooks/guard.sh <<'EOF'
#!/usr/bin/env bash
# OrbCode sends the tool call as JSON on stdin.
input=$(cat)
cmd=$(printf '%s' "$input" | jq -r '.tool_input.command // empty')
if printf '%s' "$cmd" | grep -Eq 'rm -rf (/|~|\*)'; then
  echo "Refusing to run a destructive command: $cmd" >&2
  exit 2          # exit 2 = block the tool; stderr is sent back to the model
fi
exit 0
EOF
chmod +x ~/.orbcode/hooks/guard.sh

2. Register it in ~/.orbcode/settings.json:

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "execute_command",
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/guard.sh" }
        ]
      }
    ],
    "UserPromptSubmit": [
      {
        "hooks": [
          { "type": "command", "command": "echo \"Git branch: $(git branch --show-current 2>/dev/null)\"" }
        ]
      }
    ]
  }
}

That’s it — start OrbCode normally. Now any rm -rf / the model tries is blocked with feedback, and every prompt gets the current branch appended as context. The recipes below use jq to parse JSON; install it with brew install jq / apt install jq, or parse with Python/Node — see Debugging hooks.

Where hooks live

Hooks are configured under the hooks key of settings.json. OrbCode reads two files and merges their hooks (it does not overwrite):

File	Scope	Typical use
`~/.orbcode/settings.json`	user (all projects)	personal guards, notifications
`<project>/.orbcode/settings.json`	project (this repo)	repo-specific formatters, policies

User hooks always run. Project hooks are disabled until you trust them (they ship inside a repo and run shell commands — see Security). Once trusted, a project can add hooks without clobbering your global ones — for a given event the user matchers come first, then the project matchers, and they all execute. Override the config directory with MATTERAI_CONFIG_DIR. Hooks are not written to config.json (the app’s own state file) — they are configuration you own.

Configuration shape

{
  "hooks": {
    "<EventName>": [
      {
        "matcher": "<regex>",          // optional; omit or "*" = match everything
        "hooks": [
          {
            "type": "command",         // the only supported hook type
            "command": "<shell command or script path>",
            "timeout": 60              // optional, seconds (default 10)
          }
        ]
      }
    ]
  }
}

Event name — one of the events. Unknown names are ignored.
matcher — a JavaScript regex tested against one field of the event (the tool name for PreToolUse/PostToolUse, source for SessionStart, etc.; see the per-event tables). The regex is auto-anchored (^…$), so "execute_command" matches exactly that tool name, not "execute_command_extra"; use "a|b" for alternation. Omit it, or use "*", to match everything. An invalid regex falls back to an exact-string comparison.
hooks — the commands to run when the matcher matches. You can list several; they all run.
command — run through your shell ($SHELL, falling back to /bin/sh; cmd.exe on Windows). May be an inline command or a path to a script.
timeout — per-command, in seconds. A hook that exceeds it is killed and reported as a non-blocking message. Default: 10s.

How a hook receives input (stdin)

Every hook command gets a single-line JSON object on stdin. All events include these base fields:

Field	Meaning
`session_id`	the current session/task id
`transcript_path`	path to the session’s JSON transcript on disk
`cwd`	the workspace directory
`hook_event_name`	the event that fired (e.g. `"PreToolUse"`)

Plus event-specific fields (see Events reference). The one-liner pattern every recipe uses — read stdin once, then pull fields out with jq:

input=$(cat)
tool=$(printf '%s' "$input" | jq -r '.tool_name')
file=$(printf '%s' "$input" | jq -r '.tool_input.file_path // empty')

You can also read fields straight from the environment where provided (e.g. $MATTERAI_PROJECT_DIR).

How a hook controls OrbCode

A hook influences OrbCode in two ways: its exit code (simple) and/or a JSON object printed on stdout (precise). You can use either or both.

Exit codes (the simple way)

Exit code	Meaning
0	Success. For `UserPromptSubmit` and `SessionStart`, anything the hook prints on stdout is injected into the conversation as extra context. For other events, stdout is ignored.
2	Blocking error. What “block” means depends on the event (see below). The hook’s stderr is used as the reason.
other (1, 3, …)	Non-blocking error. The agent continues; the hook’s stderr is shown to you as a warning.

What exit 2 does per event:

Event	Effect of exit 2
`PreToolUse`	The tool is not run; stderr is sent to the model as the block reason.
`PostToolUse`	The tool already ran; stderr is sent to the model as feedback.
`UserPromptSubmit`	The prompt is blocked (not sent to the model); stderr is shown to you.
`Stop`	The agent is told to keep going instead of stopping; stderr explains why.
`SessionStart`, `SessionEnd`, `Notification`, `PreCompact`	Cannot block; stderr is shown as a warning.

JSON on stdout (the precise way)

If a hook prints a JSON object (output starting with {), OrbCode parses it for fine-grained control. All fields are optional:

{
  "continue": false,                  // stop the whole turn immediately
  "stopReason": "…",                  // message shown when continue is false
  "suppressOutput": true,             // don't surface this hook's stdout
  "systemMessage": "…",               // show a note to the user
  "decision": "approve" | "block",    // approve = skip the approval prompt;
  "reason": "…",                      //   block = deny the action, with this reason
  "hookSpecificOutput": {
    "hookEventName": "PreToolUse",    // must match the event
    "permissionDecision": "allow" | "deny" | "ask",
    "permissionDecisionReason": "…",
    "updatedInput": { "command": "ls -la" },  // PreToolUse: rewrite the tool input
    "additionalContext": "…"                  // inject extra context for the model
  }
}

Quick guide to the most useful fields:

Skip the approval prompt (auto-allow a tool): {"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"allow"}}
Deny a tool with a reason: {"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"deny","permissionDecisionReason":"…"}}
Force the approval prompt even for an auto-approved tool: {"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"ask"}}
Rewrite the tool input: {"hookSpecificOutput":{"hookEventName":"PreToolUse","updatedInput":{…}}}
Inject context (any of PreToolUse/PostToolUse/UserPromptSubmit/SessionStart): {"hookSpecificOutput":{"hookEventName":"…","additionalContext":"…"}}
Block a prompt or force the agent to continue: {"decision":"block","reason":"…"}

Plain (non-JSON) stdout is treated as additionalContext for UserPromptSubmit and SessionStart, and ignored elsewhere — so echo "some context" is the shortcut for injecting context on those two events.

Events reference

OrbCode fires these events. The Matcher column is the field the matcher regex is tested against (for events with no match field, only an empty/"*" matcher applies).

`SessionStart`

Fires once, before the first turn of a session (or the first turn after --resume).

Matcher: source — "startup" or "resume".
Extra input: source.
Can: inject session context (stdout on exit 0, or additionalContext).
Cannot: block.

Example payload on stdin:

{"session_id":"…","transcript_path":"…","cwd":"…","hook_event_name":"SessionStart","source":"startup"}

`UserPromptSubmit`

Fires before each prompt is sent to the model.

Matcher: none.
Extra input: prompt (the text you typed).
Can: inject context (stdout/additionalContext), block the prompt (exit 2 or {"decision":"block"}), or stop the turn ({"continue":false}).

`PreToolUse`

Fires before a tool runs — before its approval prompt.

Matcher: tool_name.
Extra input: tool_name, tool_input (the tool’s arguments).
Can: deny the tool, allow it (skip approval), ask (force approval), rewrite tool_input via updatedInput, or add context.

`PostToolUse`

Fires right after a tool returns.

Matcher: tool_name.
Extra input: tool_name, tool_input, tool_response (the tool’s output text).
Can: add context / feedback to the model (additionalContext, or {"decision":"block","reason":…}). The tool has already run — it can’t be undone.

`Notification`

Fires when OrbCode pauses for you — when it needs permission to run a tool, or when it asks a follow-up question.

Matcher: none.
Extra input: message (what OrbCode is asking).
Can: anything with side effects (notify, log). Cannot block.

`Stop`

Fires when the model is about to finish the turn.

Matcher: none.
Extra input: stop_hook_active — true if this turn is already continuing because a Stop hook blocked it (check this to avoid loops).
Can: force the agent to keep going (exit 2 or {"decision":"block","reason":…}). OrbCode forces at most one continuation per turn as a safety net.

`PreCompact`

Fires before /compact summarizes the conversation.

Matcher: trigger — currently always "manual".
Extra input: trigger, custom_instructions.
Can: run side effects (e.g. snapshot the transcript). Cannot cancel compaction.

`SessionEnd`

Fires when the session ends: quitting (Ctrl+C / /exit), /logout, or the end of a -p (headless) run.

Matcher: reason — "prompt_input_exit", "logout", or "other".
Extra input: reason.
Can: run cleanup/logging. Capped at 3s on quit so it never wedges exit.

`SubagentStop` (reserved)

Defined for Claude Code compatibility, but OrbCode has no subagents yet, so this never fires. It’s safe to configure; it’s a no-op until subagents land.

When multiple hooks match

All matching hooks for an event run in parallel, and their results are merged:

Permission decisions combine most-restrictive-first: deny > ask > allow. If any hook denies, the action is denied.
Context (additionalContext / plain stdout) from every hook is concatenated.
updatedInput: if more than one hook rewrites the input, the last matching hook wins.
continue:false from any hook stops the turn.
Block reasons from multiple hooks are joined together.

Execution model

Hooks run through your shell; each gets the JSON payload on stdin.
Each command has its own timeout (default 10s) and is force-killed if it overruns — a slow or hung hook never wedges the agent. If a hook ignores SIGTERM, OrbCode escalates to SIGKILL after a 2s grace.
A hook that fails to start, errors, or times out is surfaced as a non-blocking message; it never crashes OrbCode.
If you interrupt the turn (Esc), in-flight hooks are signalled to abort.
Hooks are opt-in: with no hooks block, there is zero added work and zero behavior change.

Environment variables

Variable	Value
`MATTERAI_PROJECT_DIR`	the workspace directory (same as `cwd` in the payload)

Hooks inherit a redacted copy of your environment: $PATH, $HOME, $LANG, $SHELL, etc. are available, but credential-like variables are stripped so a hook can never exfiltrate your API token. Specifically redacted:

MATTERAI_TOKEN, MATTERAI_API_KEY, MATTERAI_CONFIG_DIR, MATTERAI_BACKEND_URL, MATTERAI_APP_URL (OrbCode’s own vars).
Any variable whose name matches /(?:^|_)(TOKEN|KEY|SECRET|PASSWORD|PASSWD|CREDENTIAL|PRIVATE_KEY)(?:$|_)/i (so GITHUB_TOKEN, AWS_SECRET_ACCESS_KEY, DATABASE_PASSWORD, … are redacted too).

If a hook genuinely needs a credential, pass it explicitly via the hook’s command (e.g. read it from a file the hook can access, or set a dedicated non-matching env var).

Cookbook

Each recipe is a settings.json snippet plus (where useful) a script. Put scripts under ~/.orbcode/hooks/ and chmod +x them.

Auto-format files after edits

{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "file_edit|file_write|multi_file_edit",
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/format.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/format.sh:

#!/usr/bin/env bash
input=$(cat)
# file_edit/file_write expose .tool_input.file_path; multi_file_edit uses .edits[].file_path
files=$(printf '%s' "$input" | jq -r '
  [ .tool_input.file_path, (.tool_input.edits[]?.file_path) ]
  | map(select(. != null)) | .[]')
for f in $files; do
  case "$f" in
    *.ts|*.tsx|*.js|*.jsx|*.json) npx --no-install prettier --write "$f" 2>/dev/null ;;
    *.py) black -q "$f" 2>/dev/null ;;
    *.go) gofmt -w "$f" ;;
  esac
done
exit 0

Block edits to protected files

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "file_edit|file_write|multi_file_edit",
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/protect.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/protect.sh:

#!/usr/bin/env bash
input=$(cat)
files=$(printf '%s' "$input" | jq -r '
  [ .tool_input.file_path, (.tool_input.edits[]?.file_path) ]
  | map(select(. != null)) | .[]')
for f in $files; do
  case "$f" in
    *.env|*/secrets/*|*/.git/*)
      echo "{\"hookSpecificOutput\":{\"hookEventName\":\"PreToolUse\",\"permissionDecision\":\"deny\",\"permissionDecisionReason\":\"Refusing to modify protected file: $f\"}}"
      exit 0 ;;
  esac
done
exit 0

Block dangerous shell commands

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "execute_command",
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/guard.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/guard.sh:

#!/usr/bin/env bash
input=$(cat)
cmd=$(printf '%s' "$input" | jq -r '.tool_input.command // empty')
if printf '%s' "$cmd" | grep -Eq 'rm -rf (/|~|\*)|mkfs|dd if=|:\(\)\{'; then
  echo "Blocked dangerous command: $cmd" >&2
  exit 2
fi
exit 0

Auto-approve a safe, read-only tool

Skip the approval prompt for read_file and list_files:

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "read_file|list_files|search_files",
        "hooks": [
          {
            "type": "command",
            "command": "echo '{\"hookSpecificOutput\":{\"hookEventName\":\"PreToolUse\",\"permissionDecision\":\"allow\"}}'"
          }
        ]
      }
    ]
  }
}

Always require approval for one tool

Force the prompt for web_fetch even in auto-approve mode:

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "web_fetch",
        "hooks": [
          {
            "type": "command",
            "command": "echo '{\"hookSpecificOutput\":{\"hookEventName\":\"PreToolUse\",\"permissionDecision\":\"ask\"}}'"
          }
        ]
      }
    ]
  }
}

Rewrite / normalize tool input

Force ls to always be ls -la:

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "execute_command",
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/rewrite.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/rewrite.sh:

#!/usr/bin/env bash
input=$(cat)
cmd=$(printf '%s' "$input" | jq -r '.tool_input.command // empty')
if [ "$cmd" = "ls" ]; then
  echo '{"hookSpecificOutput":{"hookEventName":"PreToolUse","updatedInput":{"command":"ls -la"}}}'
fi
exit 0

Inject dynamic context on every prompt

{
  "hooks": {
    "UserPromptSubmit": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "echo \"Repo: $(basename $MATTERAI_PROJECT_DIR) · branch $(git branch --show-current 2>/dev/null) · $(date '+%H:%M')\""
          }
        ]
      }
    ]
  }
}

Block prompts that look like leaked secrets

{
  "hooks": {
    "UserPromptSubmit": [
      {
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/no-secrets.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/no-secrets.sh:

#!/usr/bin/env bash
input=$(cat)
prompt=$(printf '%s' "$input" | jq -r '.prompt')
if printf '%s' "$prompt" | grep -Eq 'AKIA[0-9A-Z]{16}|-----BEGIN [A-Z ]*PRIVATE KEY-----'; then
  echo '{"decision":"block","reason":"That prompt appears to contain a credential — not sending it."}'
fi
exit 0

Load team conventions at session start

{
  "hooks": {
    "SessionStart": [
      {
        "hooks": [
          { "type": "command", "command": "cat ~/.orbcode/team-conventions.md 2>/dev/null || true" }
        ]
      }
    ]
  }
}

Desktop notification when OrbCode needs you (macOS)

{
  "hooks": {
    "Notification": [
      {
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/notify.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/notify.sh:

#!/usr/bin/env bash
msg=$(cat | jq -r '.message // "OrbCode needs your attention"')
osascript -e "display notification \"$msg\" with title \"OrbCode\""
exit 0

Keep working until tests pass

{
  "hooks": {
    "Stop": [
      {
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/tests-must-pass.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/tests-must-pass.sh:

#!/usr/bin/env bash
input=$(cat)
# Never loop forever: if we already forced a continuation, let it stop.
[ "$(printf '%s' "$input" | jq -r '.stop_hook_active')" = "true" ] && exit 0
if ! npm test --silent >/dev/null 2>&1; then
  echo '{"decision":"block","reason":"Tests are still failing — fix them before finishing."}'
fi
exit 0

Snapshot the transcript before compaction

{
  "hooks": {
    "PreCompact": [
      {
        "hooks": [
          { "type": "command", "command": "~/.orbcode/hooks/snapshot.sh" }
        ]
      }
    ]
  }
}

~/.orbcode/hooks/snapshot.sh:

#!/usr/bin/env bash
input=$(cat)
src=$(printf '%s' "$input" | jq -r '.transcript_path')
mkdir -p ~/.orbcode/snapshots
cp "$src" ~/.orbcode/snapshots/"$(date +%s).json" 2>/dev/null || true
exit 0

Log every session end

{
  "hooks": {
    "SessionEnd": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "input=$(cat); echo \"$(date) ended: $(printf '%s' \"$input\" | jq -r .reason)\" >> ~/.orbcode/session.log"
          }
        ]
      }
    ]
  }
}

Debugging hooks

Run a hook by hand — pipe it a fake payload and inspect the exit code:

echo '{"hook_event_name":"PreToolUse","tool_name":"execute_command","tool_input":{"command":"rm -rf /"}}' \
  | ~/.orbcode/hooks/guard.sh
echo "exit=$?"

No jq? Parse with Python or Node:

file=$(python3 -c 'import sys,json; print(json.load(sys.stdin).get("tool_input",{}).get("file_path",""))')
file=$(node -e 'let s="";process.stdin.on("data",d=>s+=d).on("end",()=>console.log((JSON.parse(s).tool_input||{}).file_path||""))')

Common pitfalls

Forgetting exit 0 at the end of a script — a leftover non-zero exit from the last command will be read as an error (or a block, if it’s 2).
Reading stdin twice — cat drains it. Read once into a variable (input=$(cat)), then reuse.
Output that accidentally starts with { — it’ll be parsed as a JSON control object. Prefix plain text (e.g. echo "note: …") if that’s not what you want.
Relative script paths — use an absolute path or ~; OrbCode runs the hook with the workspace as the working directory.
matcher on a no-match-field event (e.g. a matcher on Stop) — it will never match. Omit the matcher for those events.
Wrong tool names — OrbCode uses execute_command, file_edit, file_write, multi_file_edit, read_file, list_files, search_files, web_fetch, web_search, update_todo_list (not Claude Code’s Bash, Edit, Write, …).

A hook’s full stdout/stderr is surfaced to you when it produces a systemMessage or a non-blocking error, so you can see what went wrong.

Differences from Claude Code

The contract is identical (stdin JSON, exit-code protocol, JSON output schema, matcher regexes, parallel execution, per-command timeout). Differences:

Topic	Claude Code	OrbCode
Settings file	`~/.claude/settings.json`	`~/.orbcode/settings.json`
Project file	`.claude/settings.json`	`.orbcode/settings.json`
Project dir env var	`$CLAUDE_PROJECT_DIR`	`$MATTERAI_PROJECT_DIR`
Tool names in matchers	`Bash`, `Edit`, `Write`, `Read`, …	`execute_command`, `file_edit`, `file_write`, `read_file`, …
Hook types	`command`, plus newer MCP/HTTP/prompt hooks	`command` only
Events	full internal SDK set	the documented set: `SessionStart`, `UserPromptSubmit`, `PreToolUse`, `PostToolUse`, `Notification`, `Stop`, `PreCompact`, `SessionEnd` (+ `SubagentStop`, reserved)

Events present in newer Claude Code builds but not in OrbCode yet: PostToolUseFailure, PermissionRequest, PermissionDenied, Setup, SubagentStart, PostCompact, and the worktree/file-watch/elicitation events.

Security

Hooks execute arbitrary shell commands as your user. OrbCode treats the two sources of hooks differently:

User hooks (~/.orbcode/settings.json) are written by you and always run.
Project hooks (<repo>/.orbcode/settings.json) ship inside a repository and could come from anyone, so they are disabled until you trust them.

The trust prompt

The first time OrbCode starts in a project that defines hooks, it lists the shell commands those hooks would run and asks whether to trust them:

Trust & enable → the project’s hooks run for this workspace, and the decision is saved to ~/.orbcode/hook-trust.json.
Keep disabled → the project’s hooks never run; only your user hooks do.

Trust is bound to the exact hook configuration (a content hash). If the project’s hooks change later, OrbCode asks again — a repo can’t get a blank cheque and then quietly swap in a different command. In non-interactive (-p) mode there is no prompt, so untrusted project hooks are skipped with a warning on stderr. Set MATTERAI_TRUST_PROJECT_HOOKS=1 to trust project hooks in CI/automation where you control the repository. This env var is only honored when stdin is not a TTY — a stray export in a shell rc file cannot silently disable the trust gate for interactive sessions.

Even with the gate: review .orbcode/settings.json before trusting a repository’s hooks — trusting them runs their commands on your machine.

Other notes

Hooks see a redacted environment — they inherit $PATH, $HOME, etc. but never your API token or other credential-like variables (see Environment variables). Treat hook scripts like any other code you run locally, but OrbCode ensures they can’t silently exfiltrate your OrbCode credentials.
Injected context is sandboxed — text a hook injects via additionalContext (or plain stdout on UserPromptSubmit/SessionStart) is wrapped in <hook_context> tags and capped at ~8 KB. The system prompt tells the model to treat the contents as untrusted, so a hook can’t prompt-inject the model into running arbitrary commands.
Tool-input rewrites are logged — when a PreToolUse hook rewrites a tool’s input via updatedInput, OrbCode emits a visible system message so you can see that a hook changed what the model asked for.
Keep hook commands small and auditable; prefer checked-in scripts over long inline commands.

​Hooks

​Two-minute example

​Where hooks live

​Configuration shape

​How a hook receives input (stdin)

​How a hook controls OrbCode

​Exit codes (the simple way)

​JSON on stdout (the precise way)

​Events reference

​SessionStart

​UserPromptSubmit

​PreToolUse

​PostToolUse

​Notification

​Stop

​PreCompact

​SessionEnd

​SubagentStop (reserved)

​When multiple hooks match

​Execution model

​Environment variables

​Cookbook

​Auto-format files after edits

​Block edits to protected files

​Block dangerous shell commands

​Auto-approve a safe, read-only tool

​Always require approval for one tool

​Rewrite / normalize tool input

​Inject dynamic context on every prompt

​Block prompts that look like leaked secrets

​Load team conventions at session start

​Desktop notification when OrbCode needs you (macOS)

​Keep working until tests pass

​Snapshot the transcript before compaction

​Log every session end

​Debugging hooks

​Differences from Claude Code

​Security

​The trust prompt

​Other notes

Hooks

Two-minute example

Where hooks live

Configuration shape

How a hook receives input (stdin)

How a hook controls OrbCode

Exit codes (the simple way)

JSON on stdout (the precise way)

Events reference

`SessionStart`

`UserPromptSubmit`

`PreToolUse`

`PostToolUse`

`Notification`

`Stop`

`PreCompact`

`SessionEnd`

`SubagentStop` (reserved)

When multiple hooks match

Execution model

Environment variables

Cookbook

Auto-format files after edits

Block edits to protected files

Block dangerous shell commands

Auto-approve a safe, read-only tool

Always require approval for one tool

Rewrite / normalize tool input

Inject dynamic context on every prompt

Block prompts that look like leaked secrets

Load team conventions at session start

Desktop notification when OrbCode needs you (macOS)

Keep working until tests pass

Snapshot the transcript before compaction

Log every session end

Debugging hooks

Differences from Claude Code

Security

The trust prompt

Other notes