- In `resolveApproval`, yolo mode now returns the user policy directly (`allow`/`prompt`/`deny`) and ignores tool `override` prompts.
- Updated approval-mode and approval unit tests to match the new behavior for critical bash patterns under yolo and auto-approve.
- Updated docs and settings metadata to describe yolo as user-policy-driven rather than override-driven.
- Added `ToolTier`, `ToolApproval`, and `ToolApprovalDecision` types and exported approval APIs.
- Updated approval-mode options from `auto|prompt|custom` to `always-ask|write|yolo` and defaulted mode to `yolo`.
- Changed approval resolution to apply per-tool decisions first, then mode-tier limits, with legacy-mode migration.
- Assigned read/write/exec `approval` and approval-detail prompts across built-in, custom, extension, and MCP tools.
- Decouple the per-tool approval gate from extension presence. ExtensionRunner
and the ExtensionToolWrapper that hosts the gate are now constructed
unconditionally in createAgentSession. Previously the runner was only built
when extensionsResult.extensions.length > 0, so the entire approval system
silently disappeared for sessions with no extensions loaded — any
tools.approvalMode: prompt|custom setting was a no-op without feedback.
Today this hole was masked by createAutoresearchExtension always being
pushed inline; the unconditional construction makes the safety invariant
explicit, and a new regression test in approval-mode.test.ts pins it.
- Extend CRITICAL_BASH_PATTERNS to cover remote-fetch-then-execute shapes
that the original `bash <(curl …)` regex missed:
- `source <(curl …)` / `. <(curl …)` (anchored at command boundary so
`find . -name foo` doesn't false-positive)
- `eval "$(curl …)"` / `eval $(curl …)` / `eval `curl …``
Also adds `chmod -R` symbolic-mode forms (`u+x`, `u+rwx,o+w …`) targeting
filesystem root, and `tee` / `tee -a` writes to /etc/{passwd,shadow,sudoers}
(the standard way to write root-owned files without redirect). Benign
forms (`source ./local.sh`, `chmod -R u+x ./build`, `tee /var/log/app.log`,
`eval "$VAR"`) are pinned negative in the test suite.
- Extend formatApprovalPrompt with payload previews for the destructive tools
that previously rendered as bare `Allow tool: <name>`: eval (language +
first cell's code), task (agent + first task's id + assignment), ast_edit
(first op's pattern / replacement / paths), browser (action + tab + url +
code), and write content (alongside path). For `task` in particular this
closes the gap that docs/approval-mode.md's "parent's approval covers the
subagent" claim was waving at — the prompt now actually shows what's being
delegated.
- Tighten isMcpToolName: drop the fallback `|| toolName.includes("__")` so
an extension tool legally named `my__feature` or `pkg__util__do` is no
longer falsely labelled `Origin: MCP server tool` in the approval prompt.
Strict `mcp__` prefix only.
- Revert the cargo-cult `{ autoApprove: true } as AgentToolContext` insertions
in agent-session-python-cleanup.test.ts and sdk-move-cwd.test.ts. The tests
create sessions without passing settings, so the wrapper falls through to
approvalMode "auto" automatically; the explicit flag was unnecessary and
the `as AgentToolContext` cast hid that autoApprove lives on
CustomToolContext, not AgentToolContext.
- Document in commands/launch.ts the dual --auto-approve declaration (oclif
Flags for --help, manual parseArgs for runtime) so a future rename catches
both call sites.
- Promote the subagent caveat in docs/approval-mode.md to a callout near the
top: anything `task` is asked to do runs unattended once the parent task
call is approved.
Verification:
- bun test packages/coding-agent/test/tools/approval.test.ts → 75 pass / 0 fail
(was 57; +18 cases covering new remote-exec patterns, chmod symbolic, tee
/etc, isMcp negative, and eval/task/ast_edit/browser/write payload previews)
- bun test packages/coding-agent/test/tools/approval-mode.test.ts → 7 pass /
0 fail (was 7; +1 case asserting extensionRunner is always constructed)
- bun tsc --noEmit -p packages/coding-agent → clean
- bun x biome check . → clean
- Windows EBUSY tempdir-cleanup noise in agent-session-python-cleanup and
sdk-move-cwd is pre-existing on this branch (already documented in the
PR body) and absent on Linux CI.
- approval: user 'tool: deny' now wins over critical-pattern override
(the override only tightens allow->prompt; it must never re-arm a denied tool).
- approval: rename hindsight policy keys to match registered tool names
(recall/retain/reflect, not hindsight_recall/hindsight_retain).
- approval: head+tail truncation for bash/ssh command prompts so a
destructive suffix buried after a long benign preamble stays visible.
- task/executor: force tools.approvalMode='auto' in createSubagentSettings
so subagents (which have no UI) cannot deadlock on per-tool prompts;
the parent's approval of the task call is the authorization.
- docs/approval-mode: rewrite so every example surfaces tools.approvalMode
and explains that tools.approval is ignored outside 'custom' mode.
Re-introduces the per-tool approval system from luzidd's commit 39124f3 (which
is no longer reachable from main) and improves it before re-landing.
What's restored:
- ApprovalPolicy (allow/deny/prompt) plus DEFAULT_APPROVAL_POLICIES.
- ACTION_EXCEPTIONS registry (LSP read-only, bash critical patterns).
- getApprovalPolicy() six-level resolution order.
- ExtensionToolWrapper.execute() gate before extension handlers.
- --auto-approve / --yolo CLI flag and tools.approval.<tool> user config.
- docs/approval-mode.md user guide.
What's improved over the original:
- Replaced unchecked 'as any' casts with typed unknown narrowing helpers.
- Validate userConfig values: invalid strings, numbers, etc. fall through to
the built-in default instead of being silently honoured (typo no longer
locks a tool out or grants implicit approval).
- Expanded CRITICAL_BASH_PATTERNS: chmod -R /, chown -R /, bash <(curl ...),
writes to /etc/passwd|shadow|sudoers, shutdown/reboot/halt/init 0,
kill -9 1, nc -e / nc -c reverse shells. Pattern shapes require a
command-position boundary so 'npm run reboot-tests' and 'echo "shutdown the
queue"' don't false-positive.
- Added DEBUG_READONLY_ACTIONS exception so DAP inspection actions (threads,
stack_trace, variables, scopes, read_memory, …) auto-allow while
execution-side actions (launch, attach, continue, evaluate, write_memory,
set_breakpoint, …) still prompt.
- formatApprovalPrompt: labels mcp__<server>__<tool> calls as MCP server
tools, surfaces ssh host + command, recognises the modern § hashline header
for edit, and truncates >240-char fields so a heredoc-sized body cannot
blow out the confirmation dialog.
- Test suite grown from 40 to 57 cases — new coverage for invalid user
config, the extended critical-bash patterns, benign-keyword negatives,
debug exceptions, MCP/ssh prompt formatting, and command truncation.
Verification:
- bun test packages/coding-agent/test/tools/approval.test.ts -> 57 pass
- bun x biome check . -> clean
- bun run check:ts across all 9 workspaces -> clean
can1357