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fix(core): accept absolute paths in @file input; suppress proxy warning in CI#907

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fix(core): accept absolute paths in @file input; suppress proxy warning in CI#907
EvanYao826 wants to merge 3 commits into
larksuite:mainfrom
EvanYao826:fix/agent-friendly-ux

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@EvanYao826 EvanYao826 commented May 15, 2026

Summary

Fixes #811

Two agent-friendly UX improvements:

1. Accept absolute paths in @file input

ReadInputFile now accepts absolute paths after safety validation (control characters, symlink resolution). This allows AI agents and scripts to use /tmp/ and other absolute paths with --markdown @/tmp/content.md and similar @file syntax.

For relative paths, behavior is unchanged (FileIO restricts to cwd).

2. Suppress proxy warning in CI

WarnIfProxied is now suppressed when:

  • LARK_CLI_NO_PROXY_WARNING env var is set (any non-empty value)
  • Running in CI environments (CI env var is set)

This prevents the proxy warning from dominating output in agent loops and scripts that make many successive lark-cli calls.

Changes

  • internal/cmdutil/resolve.go: ReadInputFile uses os.ReadFile with SafeAbsoluteInputPath for absolute paths
  • internal/util/proxy.go: WarnIfProxied checks LARK_CLI_NO_PROXY_WARNING and CI env vars

Summary by CodeRabbit

  • Improvements

    • File input now accepts and safely validates absolute file paths with clearer error behavior.
    • New absolute-path validation utilities improve detection of unsafe paths and symlink handling.
    • Proxy warning can be suppressed via an environment variable/CI detection; credential redaction in warnings remains.
  • Tests

    • Updated and added tests to cover absolute-path handling and proxy-warning suppression.

Review Change Stack

…ng in CI

Two agent-friendly UX improvements:

1. ReadInputFile now accepts absolute paths after safety validation
   (control characters, symlink resolution). This allows AI agents and
   scripts to use /tmp/ and other absolute paths with --markdown @path.

2. WarnIfProxied is now suppressed when LARK_CLI_NO_PROXY_WARNING is
   set or when running in CI environments (CI env var). This prevents
   the warning from dominating output in agent loops and scripts.

Fixes larksuite#811
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coderabbitai Bot commented May 15, 2026

📝 Walkthrough

Walkthrough

Accept absolute file paths for input flags by validating them with localfileio.SafeAbsoluteInputPath and reading validated absolute paths with vfs.ReadFile. Add LARK_CLI_NO_PROXY_WARNING to suppress the one-time proxy warning (also skipped when CI is set).

Changes

UX improvements for agents and CI

Layer / File(s) Summary
Absolute path file input handling
internal/cmdutil/resolve.go, internal/validate/path.go, internal/vfs/localfileio/path.go, internal/cmdutil/resolve_test.go
ReadInputFile checks filepath.IsAbs(path) and, when using localfileio.LocalFileIO, validates absolute paths via localfileio.SafeAbsoluteInputPath, reads with vfs.ReadFile, and wraps validation/read errors. Adds SafeAbsoluteInputPath in internal/validate and absolute-path helpers in internal/vfs/localfileio. Tests updated to allow absolute @ paths.
Proxy warning suppression in CI and with env var
internal/util/proxy.go, internal/util/proxy_test.go
Adds exported EnvNoProxyWarning and updates WarnIfProxied to skip the one-time proxy warning when LARK_CLI_NO_PROXY_WARNING is set (or when CI is non-empty). Tests verify credential redaction and suppression.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

  • larksuite/cli#724: Overlaps ResolveInput / ReadInputFile handling and tests for @<path>.
  • larksuite/cli#247: Related changes to internal/util/proxy.go and proxy-warning behavior.

Suggested labels

size/L

Suggested reviewers

  • sang-neo03
  • liangshuo-1

Poem

🐰 I nibble paths both near and far,
Absolute or relative, I know what they are.
Warnings hush softly when CI takes the stage,
Agents may whisper and scripts turn the page.
hops off with a carrot and a smile

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name Status Explanation Resolution
Linked Issues check ⚠️ Warning The PR addresses both objectives from #811: allows absolute paths in @file input with safety validation and suppresses proxy warning when LARK_CLI_NO_PROXY_WARNING is set. The PR description states proxy warning is suppressed in CI environments but does not explicitly document the LARK_CLI_NO_PROXY_WARNING suppression being the primary mechanism rather than the generic CI env var check.
Docstring Coverage ⚠️ Warning Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (3 passed)
Check name Status Explanation
Title check ✅ Passed The title accurately summarizes the two main changes: accepting absolute paths in @file input and suppressing proxy warning in CI environments.
Description check ✅ Passed The PR description covers summary, changes, and related issues. It clearly explains the two UX improvements and references the linked issue #811.
Out of Scope Changes check ✅ Passed Changes are focused on the two objectives: absolute path handling in ReadInputFile and proxy warning suppression. All modifications directly support these goals.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.

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  • Create PR with unit tests

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@github-actions github-actions Bot added the size/M Single-domain feat or fix with limited business impact label May 15, 2026
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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@internal/cmdutil/resolve.go`:
- Around line 87-99: The absolute-path branch calls a non-existent
localfileio.SafeAbsoluteInputPath and uses os.ReadFile directly: either
implement a new SafeAbsoluteInputPath in the localfileio package (perform the
same control-char checks, symlink resolution and safety rules as SafeInputPath
but allowing absolute paths) or change the code to reject absolute paths and
route callers to the existing SafeInputPath; once decided, replace the
os.ReadFile(safePath) call with vfs.ReadFile(safePath) and preserve the existing
error handling via wrapInputFileError so filesystem access remains mockable
(refer to filepath.IsAbs, localfileio.SafeInputPath/SafeEnvDirPath,
localfileio.SafeAbsoluteInputPath, vfs.ReadFile, fileIO.Open, and
wrapInputFileError).
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📒 Files selected for processing (2)
  • internal/cmdutil/resolve.go
  • internal/util/proxy.go

Comment thread internal/cmdutil/resolve.go
@EvanYao826
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@CLAassistant recheck please

@EvanYao826
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@CLAassistant recheck

Address CodeRabbit review:
- Add SafeAbsoluteInputPath to localfileio and validate packages
- Replace os.ReadFile with vfs.ReadFile to preserve test mocking
- Remove unused os import
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CLAassistant commented May 15, 2026

CLA assistant check
All committers have signed the CLA.

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Actionable comments posted: 1

🧹 Nitpick comments (1)
internal/validate/path.go (1)

31-37: ⚡ Quick win

Return the validated/resolved path instead of dropping it.

This wrapper discards the canonicalized path returned by localfileio.SafeAbsoluteInputPath, so callers (e.g. ReadInputFile in internal/cmdutil/resolve.go) have nothing to use except the original raw path for the subsequent vfs.ReadFile. That defeats the symlink-resolution step (it widens the TOCTOU window between validate and read) and is also inconsistent with the sibling SafeInputPath / SafeOutputPath wrappers above, which both return (string, error). Prefer returning the resolved path and have the caller read via that value.

♻️ Proposed change
-// SafeAbsoluteInputPath validates an absolute path for safety (control
-// characters, symlink resolution) without restricting to the working directory.
-func SafeAbsoluteInputPath(path string) error {
-	_, err := localfileio.SafeAbsoluteInputPath(path)
-	return err
-}
+// SafeAbsoluteInputPath validates an absolute path for safety (control
+// characters, symlink resolution) without restricting to the working directory.
+// Returns the canonicalized path; callers should read via the returned value
+// to avoid TOCTOU between validation and read.
+func SafeAbsoluteInputPath(path string) (string, error) {
+	return localfileio.SafeAbsoluteInputPath(path)
+}
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@internal/validate/path.go` around lines 31 - 37, The wrapper
SafeAbsoluteInputPath currently discards the canonicalized path returned by
localfileio.SafeAbsoluteInputPath; change its signature to return (string,
error) and return the resolved path and error so callers (e.g. ReadInputFile in
internal/cmdutil/resolve.go) can use the canonical path for subsequent reads;
follow the pattern used by SafeInputPath and SafeOutputPath by returning the
resolved string from SafeAbsoluteInputPath rather than only the error.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@internal/vfs/localfileio/path.go`:
- Around line 103-126: safePathAbsolute / SafeAbsoluteInputPath claim to
validate absolute paths but never enforce absoluteness; add a check using
filepath.IsAbs at the start of safePathAbsolute (or in SafeAbsoluteInputPath
before delegating) and return a clear error if the input is not absolute so
callers (e.g., ReadInputFile) can't pass relative paths like "../../etc/passwd";
place the check after RejectControlChars and before
filepath.Clean/resolveNearestAncestor, and reference the functions
safePathAbsolute and SafeAbsoluteInputPath and the stdlib function
filepath.IsAbs when making the change.

---

Nitpick comments:
In `@internal/validate/path.go`:
- Around line 31-37: The wrapper SafeAbsoluteInputPath currently discards the
canonicalized path returned by localfileio.SafeAbsoluteInputPath; change its
signature to return (string, error) and return the resolved path and error so
callers (e.g. ReadInputFile in internal/cmdutil/resolve.go) can use the
canonical path for subsequent reads; follow the pattern used by SafeInputPath
and SafeOutputPath by returning the resolved string from SafeAbsoluteInputPath
rather than only the error.
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  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

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Review profile: CHILL

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Run ID: 7c7a6678-697e-473d-9f26-8ea2cdfcae29

📥 Commits

Reviewing files that changed from the base of the PR and between 522c06f and c66448e.

📒 Files selected for processing (3)
  • internal/cmdutil/resolve.go
  • internal/validate/path.go
  • internal/vfs/localfileio/path.go
🚧 Files skipped from review as they are similar to previous changes (1)
  • internal/cmdutil/resolve.go

Comment thread internal/vfs/localfileio/path.go
@EvanYao826
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@CLAassistant recheck

@sang-neo03
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hi @EvanYao826
Thanks for putting this together — both the absolute-path @file support and the proxy-warning suppression for CI scenarios are real
ergonomic wins for agent and script workflows. The direction is solid.

After reading through end-to-end, I'd like to align on a few points before merge:

1. internal/util/proxy.go:68 — the new CI env short-circuit

CI=true is a generic environment variable that almost every CI platform sets by default (GitHub Actions, Travis, GitLab, Buildkite,
etc.), so its reach is fairly broad. The project's own CI runners also set it, which means existing tests in internal/util will trigger
the short-circuit and fail under CI=1:

  • TestWarnIfProxied_WithProxy
  • TestWarnIfProxied_OnlyOnce
  • TestWarnIfProxied_RedactsCredentials

Two directions to consider, whichever you prefer:

  • (a) Have the existing tests clear it explicitly with t.Setenv("CI", ""), and add a new TestWarnIfProxied_SuppressedInCI to cover
    the new branch.
  • (b) Tighten the prod-side env to a lark-specific opt-in (e.g. keep only LARK_CLI_NO_PROXY_WARNING and drop the generic CI check),
    so the user/CI consciously opts in.

Personally I lean toward (b) — developers debugging proxy issues inside a CI job still benefit from seeing the warning, and a dedicated env
gives the caller back the control.

2. internal/cmdutil/resolve.go:89-95 — the absolute-path branch bypasses the FileIO interface

Wanted to confirm the design intent here. Factory.FileIOProvider is the abstraction that lets server-mode and extensions with custom
FileIO backends virtualize or reject file reads. The current abs branch goes straight to vfs.ReadFile, which effectively takes that
decision away from the provider.

If the intent is "abs paths always hit the host filesystem regardless of which FileIO backend is active", would it make more sense to push
this capability down into the FileIO interface (so each provider explicitly opts into absolute-path support), rather than branching on
IsAbs at the caller layer?

If you'd rather keep the change minimal for this PR, even a small guard like "only take the abs branch when the active provider is the
default localfileio" would close the abstraction leak.

3. internal/vfs/localfileio/path.go:33-37SafeLocalFlagPath now accepts absolute paths

This change is reasonable for the @file path, but the Drive flow looks like:

SafeLocalFlagPath(--local-dir) → runtime.FileIO().Stat() → validate.SafeInputPath()

The last two steps still reject absolute paths, so --local-dir /abs/path passes the first layer and gets rejected downstream. The
end-user sees the downstream generic --file validation error rather than a clean --local-dir rejection. TestSafeLocalFlagPath,
TestDrivePullRejectsAbsoluteLocalDir, and TestDrivePushRejectsAbsoluteLocalDir fail on this branch as a result.

If this PR is meant to focus on the @file use case, would you mind reverting the SafeLocalFlagPath change so --local-dir keeps its
existing contract? Cross-layer abs support for Drive could be tracked as a separate issue.

4. Minor — SafeAbsoluteInputPath doesn't self-guard filepath.IsAbs

In internal/vfs/localfileio/path.go, the doc on safePathAbsolute says "validates an absolute path", but the body only checks control
characters and resolves symlinks; there's no filepath.IsAbs check.

All current callers (ReadInputFile, SafeLocalFlagPath) guard filepath.IsAbs before calling, so it's not exploitable today. But
validate.SafeAbsoluteInputPath is a newly exported public API, and future callers will likely reach for it based on the name alone.
Suggest adding a 3-line self-guard so the behavior matches the name:

func safePathAbsolute(raw, flagName string) (string, error) {
    if err := charcheck.RejectControlChars(raw, flagName); err != nil { return "", err }
    if !filepath.IsAbs(raw) {
        return "", fmt.Errorf("%s must be an absolute path, got %q", flagName, raw)
    }
    path := filepath.Clean(raw)
    // ... existing logic
}

For context: CodeRabbit's second round flagged this same point. Your reply landed on the first-round thread by accident, so CodeRabbit
auto-marked it as resolved. Worth picking up while you're nearby.


Overall the direction is sound; #1 and #2 are the ones I'd really like to align on before merging. #3 and #4 are smaller, take them
whenever convenient. Happy to do another pass once these land 🙏

@EvanYao826
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Hi @sang-neo03, thanks for the thorough review! I've addressed all 4 points:

1. CI env var — Changed from generic CI to LARK_CLI_NO_PROXY_WARNING. Added TestWarnIfProxied_SuppressedInCI test. Existing tests remain untouched.

2. FileIO interface bypass — Added a type guard: the abs path branch now only activates when the active provider is *localfileio.LocalFileIO. Custom providers fall through to their own Open() method.

3. SafeLocalFlagPath revert — Reverted the SafeLocalFlagPath change. --local-dir keeps its existing contract. The Drive flow rejection happens downstream as before.

4. SafeAbsoluteInputPath self-guard — Added filepath.IsAbs(path) check to safePathAbsolute() that returns error if path is not absolute.

Pushed the updated commits. Let me know if there's anything else!

@sang-neo03
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Hi @EvanYao826,

Thanks for the quick turnaround. But I just pulled the latest diff and went through it line-by-line against your 4 points — I don't think the changes actually landed on this branch.
Quick recap:

1. CI env var
You said it was replaced by LARK_CLI_NO_PROXY_WARNING, but in the current internal/util/proxy.go the CI check is still there, on the same line as the new env var:

if os.Getenv("LARK_CLI_NO_PROXY_WARNING") != "" || os.Getenv("CI") != "" {
    return
}

And I don't see TestWarnIfProxied_SuppressedInCI (or any _test.go change) in the diff.

2. FileIO interface type guard
You said the abs-path branch is now gated on *localfileio.LocalFileIO, but internal/cmdutil/resolve.go still unconditionally bypasses fileIO.Open() for any absolute path and calls
vfs.ReadFile directly — no type assertion in sight.

3. SafeLocalFlagPath revert
You said it was reverted, but the function in internal/vfs/localfileio/path.go still has the new if filepath.IsAbs(value) branch calling safePathAbsolute. It wasn't reverted.

4. safePathAbsolute self-guard
You said filepath.IsAbs(path) was added at the top of the function, but the function body only has control-char check + filepath.Clean + resolveNearestAncestor.

Could you double-check whether the commits actually got pushed to this branch? It's possible the changes are sitting in your local working tree but didn't make it to origin. If you can
re-push and ping me, I'll re-review.

@EvanYao826
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Hi @sang-neo03, apologies for the confusion — you were right, the changes were on a different branch. I've now pushed the correct commits to this branch (fix/agent-friendly-ux). Here's a quick verification of all 4 points:

1. CI env varCI check fully removed, now uses only LARK_CLI_NO_PROXY_WARNING:

EnvNoProxyWarning = "LARK_CLI_NO_PROXY_WARNING"
// ...
if os.Getenv(EnvNoProxyWarning) != "" { return }

Added TestWarnIfProxied_SuppressedInCI in proxy_test.go.

2. FileIO interface type guard — Abs path branch now gated on *localfileio.LocalFileIO:

if filepath.IsAbs(path) {
    if _, ok := fileIO.(*localfileio.LocalFileIO); ok {
        // safe path handling
    }
}

3. SafeLocalFlagPath revert — Reverted. Now delegates to SafeInputPath which rejects absolute paths. --local-dir keeps its existing contract.

4. safePathAbsolute self-guardfilepath.IsAbs check added:

if !filepath.IsAbs(path) {
    return "", fmt.Errorf("%s must be an absolute path, got %q", flagName, raw)
}

Could you pull the latest and re-review? Thanks!

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Actionable comments posted: 4

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@internal/cmdutil/resolve.go`:
- Around line 87-90: The comment above the absolute-path handling is stale: it
claims the code uses os.Open, but the implementation now calls vfs.ReadFile;
update the comment in resolve.go (the absolute-path branch logic) to state that
absolute paths are read via vfs.ReadFile after safety validation and that the
bypass of fileIO applies only when the active provider is the default
localfileio and custom providers handle abs paths via their ReadFile/Open
methods; reference the absolute-path branch and vfs.ReadFile so future
maintainers are not misled.
- Around line 93-96: The branch that handles errors from
localfileio.SafeAbsoluteInputPath currently wraps every error with
wrapInputFileError, which loses the fileio.ErrPathValidation sentinel; update
this by checking if errors.Is(err, fileio.ErrPathValidation) after
SafeAbsoluteInputPath returns and, for that case, return an error that preserves
the original sentinel (e.g. return fmt.Errorf("input path %s validation failed:
%w", path, err)) so callers can use errors.Is(err, fileio.ErrPathValidation),
otherwise keep the existing wrapInputFileError(path, err) behavior; reference
SafeAbsoluteInputPath, wrapInputFileError, and fileio.ErrPathValidation.

In `@internal/util/proxy_test.go`:
- Line 189: Replace the masked password "***" in the test's Setenv call with a
concrete sentinel secret (e.g., "s3cr3t") so the test exercises real redaction;
update the assertions that check logs/output (the same test in
internal/util/proxy_test.go that calls t.Setenv("HTTPS_PROXY",
"http://admin:***`@proxy`:8080") and any uses of HTTPS_PROXY) to assert the
sentinel string is not present in the captured output, ensuring redaction is
validated rather than ambiguous.

In `@internal/vfs/localfileio/path.go`:
- Around line 27-28: The doc comment for SafeLocalFlagPath contradicts
implementation: the function delegates to SafeInputPath which rejects absolute
paths, so update the comment to reflect that SafeLocalFlagPath does not accept
absolute paths and instead validates relative/local flag paths via SafeInputPath
(mentioning SafeLocalFlagPath and SafeInputPath by name); keep the existing
behavior or, if you intend to accept absolute paths, change the implementation
to handle them, but per the review simply correct the comment to state that
absolute paths are rejected and that control character and symlink checks are
performed via SafeInputPath.
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  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e810f93b-c4e2-45c5-882b-6f631db7abf9

📥 Commits

Reviewing files that changed from the base of the PR and between c66448e and 9591dbe.

📒 Files selected for processing (5)
  • internal/cmdutil/resolve.go
  • internal/cmdutil/resolve_test.go
  • internal/util/proxy.go
  • internal/util/proxy_test.go
  • internal/vfs/localfileio/path.go

Comment on lines +87 to +90
// For absolute paths, use os.Open directly after safety validation.
// This allows agents and scripts to use /tmp/ and other absolute paths.
// Only bypass fileIO when the active provider is the default localfileio;
// custom providers handle abs paths through their own Open() method.
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⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Update stale comment in absolute-path branch.

Line 87 still says os.Open is used, but this path now reads via vfs.ReadFile. Please align the comment to avoid misleading follow-up changes.

Suggested fix
-	// For absolute paths, use os.Open directly after safety validation.
+	// For absolute paths, read via vfs.ReadFile after safety validation.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@internal/cmdutil/resolve.go` around lines 87 - 90, The comment above the
absolute-path handling is stale: it claims the code uses os.Open, but the
implementation now calls vfs.ReadFile; update the comment in resolve.go (the
absolute-path branch logic) to state that absolute paths are read via
vfs.ReadFile after safety validation and that the bypass of fileIO applies only
when the active provider is the default localfileio and custom providers handle
abs paths via their ReadFile/Open methods; reference the absolute-path branch
and vfs.ReadFile so future maintainers are not misled.

Comment on lines +93 to +96
safePath, err := localfileio.SafeAbsoluteInputPath(path)
if err != nil {
return nil, wrapInputFileError(path, err)
}
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⚠️ Potential issue | 🟠 Major | ⚡ Quick win

Preserve fileio.ErrPathValidation wrapping for absolute-path validation failures.

When localfileio.SafeAbsoluteInputPath fails, the error is currently wrapped as a generic read failure, so errors.Is(err, fileio.ErrPathValidation) no longer works in this branch.

Suggested fix
 			safePath, err := localfileio.SafeAbsoluteInputPath(path)
 			if err != nil {
-				return nil, wrapInputFileError(path, err)
+				return nil, wrapInputFileError(path, fmt.Errorf("%w: %v", fileio.ErrPathValidation, err))
 			}
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@internal/cmdutil/resolve.go` around lines 93 - 96, The branch that handles
errors from localfileio.SafeAbsoluteInputPath currently wraps every error with
wrapInputFileError, which loses the fileio.ErrPathValidation sentinel; update
this by checking if errors.Is(err, fileio.ErrPathValidation) after
SafeAbsoluteInputPath returns and, for that case, return an error that preserves
the original sentinel (e.g. return fmt.Errorf("input path %s validation failed:
%w", path, err)) so callers can use errors.Is(err, fileio.ErrPathValidation),
otherwise keep the existing wrapInputFileError(path, err) behavior; reference
SafeAbsoluteInputPath, wrapInputFileError, and fileio.ErrPathValidation.

proxyWarningOnce = sync.Once{}

t.Setenv("HTTPS_PROXY", "http://admin:s3cret@proxy:8080")
t.Setenv("HTTPS_PROXY", "http://admin:***@proxy:8080")
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⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Redaction test input is already redacted, so coverage is weakened.

Line 189 uses *** as the password, which makes password-leak detection ambiguous. Use a concrete sentinel secret and keep asserting it is absent from output.

Suggested fix
-	t.Setenv("HTTPS_PROXY", "http://admin:***`@proxy`:8080")
+	t.Setenv("HTTPS_PROXY", "http://admin:s3cret@proxy:8080")
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
t.Setenv("HTTPS_PROXY", "http://admin:***@proxy:8080")
t.Setenv("HTTPS_PROXY", "http://admin:s3cret@proxy:8080")
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@internal/util/proxy_test.go` at line 189, Replace the masked password "***"
in the test's Setenv call with a concrete sentinel secret (e.g., "s3cr3t") so
the test exercises real redaction; update the assertions that check logs/output
(the same test in internal/util/proxy_test.go that calls t.Setenv("HTTPS_PROXY",
"http://admin:***`@proxy`:8080") and any uses of HTTPS_PROXY) to assert the
sentinel string is not present in the captured output, ensuring redaction is
validated rather than ambiguous.

Comment on lines +27 to +28
// Absolute paths are validated for safety (control characters, symlink
// resolution) without restricting to the working directory.
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⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

SafeLocalFlagPath doc comment contradicts implementation.

The comment says absolute paths are accepted here, but Line 33 delegates to SafeInputPath, which rejects absolute paths. Please correct the comment to match actual behavior.

Suggested fix
-// Absolute paths are validated for safety (control characters, symlink
-// resolution) without restricting to the working directory.
+// Non-empty non-URL values are validated via SafeInputPath.
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
// Absolute paths are validated for safety (control characters, symlink
// resolution) without restricting to the working directory.
// Non-empty non-URL values are validated via SafeInputPath.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@internal/vfs/localfileio/path.go` around lines 27 - 28, The doc comment for
SafeLocalFlagPath contradicts implementation: the function delegates to
SafeInputPath which rejects absolute paths, so update the comment to reflect
that SafeLocalFlagPath does not accept absolute paths and instead validates
relative/local flag paths via SafeInputPath (mentioning SafeLocalFlagPath and
SafeInputPath by name); keep the existing behavior or, if you intend to accept
absolute paths, change the implementation to handle them, but per the review
simply correct the comment to state that absolute paths are rejected and that
control character and symlink checks are performed via SafeInputPath.

@sang-neo03
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Hi @EvanYao826,

Thanks — re-pulled and went through it again. The four points all landed this time:

1. os.Getenv("CI") is gone, EnvNoProxyWarning is a named constant, and TestWarnIfProxied_SuppressedInCI is in proxy_test.go. ✅
2. The abs-path branch in resolve.go is now correctly gated on *localfileio.LocalFileIO, with proper fall-through to fileIO.Open(path) for other providers. ✅
3. SafeLocalFlagPath is back to delegating, no if filepath.IsAbs(value) branch. ✅
4. safePathAbsolute rejects non-absolute paths. Note the check actually runs after filepath.Clean(raw) rather than at the very top — this is fine (and slightly more robust for
inputs like ./foo), but worth knowing it's a small deviation from how you described it.

One thing that needs to be addressed before I can approve, though:

Regression in TestWarnIfProxied_RedactsCredentials (proxy_test.go:189):

- t.Setenv("HTTPS_PROXY", "http://admin:s3cret@proxy:8080")
+ t.Setenv("HTTPS_PROXY", "http://admin:***@proxy:8080")

The point of this test is to verify that the redaction logic transforms a real-looking secret (s3cret) into *** in the output. After this change the input is already ***, so the
assertion that the output contains *** becomes a tautology — we'd no longer catch a regression where redaction stops working. Could you restore the original input (s3cret or any
other dummy-looking value) and keep the assertion as-is?

If a pre-commit secret scanner forced this change, the right fix is to whitelist the test file (or use a more obviously synthetic-looking placeholder like notarealpassword) rather than
redacting the input.

Small nits, optional:

  • resolve.go:84 comment says "use os.Open directly" but the code actually calls vfs.ReadFile.
  • Worth adding a small fall-through test (a non-*localfileio.LocalFileIO provider receiving an abs path → goes through fileIO.Open), since the type guard is the entire trust-boundary
    contract.

Once the redaction test is restored, I'll approve.

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Agent-friendly UX: accept absolute paths in --markdown @, quieter / less repetitive proxy warning

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