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fix: preserve zsh startup directory semantics - #630
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Included review availability: Your plan provides up to 8 included reviews per hour; 2 remain after this review. WalkthroughThe change updates zsh shell integration to preserve parent and child ChangesZsh startup integration
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to No concrete merge-blocking risk remains from the reviewed changes. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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| Filename | Overview |
|---|---|
| internal/terminal/pty/shell_integration.go | Implements staged zsh startup bridges that restore user directory state, isolate child shells, and install markers after user configuration. |
| internal/terminal/pty/pty_test.go | Adds real-zsh contract coverage for startup ordering, redirected and empty ZDOTDIR values, inherited metadata, plugins, and nested-shell nonce isolation. |
| .github/workflows/ci.yml | Installs zsh on Linux runners and explicitly executes the shell integration contract on shard zero. |
| docs/qa/reports/2026-09-12-zsh-startup-fidelity.md | Records the verified startup behaviors, follow-up coverage, and platform limitations. |
Flowchart
%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[zsh starts with shim ZDOTDIR] --> B[shim .zshenv]
B --> C[restore original user ZDOTDIR]
C --> D[source user .zshenv]
D --> E{interactive with rcs?}
E -- no --> F[continue native noninteractive startup]
E -- yes --> G[capture user ZDOTDIR state]
G --> H[route to shim .zprofile for login shells]
H --> I[restore and source user .zprofile]
I --> J[resume shim routing]
J --> K[shim .zshrc]
K --> L[restore and source user .zshrc]
L --> M[install authenticated markers]
G --> N[early child shell]
N --> O[validate current shim root]
O --> P[restore inherited user directory state]
P --> Q[source child's user startup without parent nonce]
Reviews (4): Last reviewed commit: "ci: bound and expose real zsh startup ve..." | Re-trigger Greptile
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Inline comments:
In `@internal/terminal/pty/shell_integration.go`:
- Line 108: Update zshContinueIntegration so the private shim ZDOTDIR is not
exported to child shells; preserve the original ZDOTDIR for inheritance while
retaining the shim routing only for the parent startup flow. Add a regression
test covering a child launched before zshRestoreDirectory verifies it keeps the
original ZDOTDIR and does not load the parent zshMarkerScript nonce.
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docs/_memory/change-impact.mdis excluded by!**/*.mddocs/qa/reports/2026-09-12-zsh-startup-fidelity.mdis excluded by!**/*.mddocs/qa/scenarios/ET-terminal-shell-config-fidelity.mdis excluded by!**/*.md
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internal/terminal/pty/pty_test.gointernal/terminal/pty/shell_integration.go
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@coderabbitai review Please cover the current head d24639f, specifically the Greptile remediation that binds child metadata to the current private shim root and tests stale inherited metadata. The current walkthrough still records source/covered commit 07cb7c4, so I cannot use it as review coverage for this later production change. The walkthrough's docstring-coverage warning has also been evaluated: the touched helpers and tests are internal, and |
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I will focus on the child-metadata binding to the active private shim root and the stale inherited-metadata test coverage. I will treat the generic docstring-coverage warning as not applicable for these internal helpers and tests. I used the repository guidance you provided. ✏️ Learnings added
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What & why
Closes #626.
Opening an integrated zsh with a plugin manager that reads
${ZDOTDIR:-$HOME}/.zsh_plugins.txtpreviously looked for the bundle inside CompozyOS's private shim directory. The shim sourced the
user's files without restoring their environment. A
.zshenvthat changed ZDOTDIR could alsocause zsh to bypass the injected
.zshrc, losing authenticated command markers.The shim now restores the original ZDOTDIR before user
.zshenvexecutes, including inherited,unset, explicitly empty, and quoted values. It temporarily resumes shim routing between
interactive startup stages, adding a
.zprofilebridge for login shells. Each bridge preservesZDOTDIR's declaration and export attribute, restores it before user code, and follows any user
redirection when locating the next file. The final
.zshrcrestores the user's environment andinstalls the existing markers after user configuration. Native zsh handles
.zloginand.zlogout.Noninteractive shells restore their environment without continuing interactive shim routing.
This preserves the zsh user-startup ordering
without rewriting user configuration. Nested shells inherit user configuration rather than
installing the parent's nonce. Early children launched by global startup files restore the user
directory/export state before sourcing their own configuration and bypass parent marker injection.
Child metadata is bound to the current private shim; stale inherited metadata cannot disable
authenticated markers in a new terminal. Global system startup remains owned by zsh; the behavioral
regressions exercise user configuration.
How you verified it
Implemented and checked by Codex (GPT-6 Astra).
TestShellIntegrationContractsuite: missing plugin bundle, marker loss after.zshenvredirection, and nested shim inheritance.
CGO_ENABLED=1 go test -race ./internal/terminal/pty -run TestShellIntegrationContract -count=1 -timeout=60spasses on macOS arm64 with zsh 5.9.and custom quoted directories,
.zshenvredirection/unsetting, and.zprofile/.zshrcredirection. Exact traces match startup ordering and environment attributes. Both parent and
child load their bundles; the parent emits authenticated start/finish markers and the child
does not inherit its nonce.
shell cases were skipped without that runtime dependency.
with custom and explicitly empty values. Existing bash, fish setup, disabled-integration,
private-shim and cleanup checks remain in the canonical suite.
make gatepassed before a subsequent user override. All review follow-up validationruns exclusively through GitHub Actions; no later local gate is used as delivery evidence.
evidence. No new rendered Web or packaged-desktop walk is claimed. Linux zsh coverage requires
an actual non-skipped run; current-head CI and reviewer completion are tracked separately.
Impact
The cross-surface audit
covers native terminal tools, config/hooks, workspace isolation, compatibility, official skill,
Web and Docs. Public tool IDs, HTTP/UDS/CLI schemas, journal markers and
terminal.shell_integrationare unchanged. No persistence migration or recovery action is required. Bash/fish behavior and
disabled integration are unchanged. The affected
ET-terminal-shell-config-fidelityQA scenarionow includes user directory redirection and nested shell behavior. The existing official terminal
skill and site interfaces require no resource or API update.
make gatepasses locally; this PR is delivered only after its required CI checks are green