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fix(skills): run the picked skill when two share a name - #19702
Picking a skill must run that file when another skill has the same name. Discovery and the web/desktop and mobile menus now retain each local file, show its path, and carry the selected path through composer edits, drafts, history, and provider dispatch. Skill descriptions wrap so long paths stay distinguishable.
Codex receives structured skill inputs for start and steer. Other providers receive an instruction bound to the selected file, without accidental native name dispatch. Enabled agent-only collisions also require an exact-file pick; unique names and native URI skills retain plain mentions. No wire or schema field was added.
Rebuilt from floklein's contribution in #19702, preserving the contributor commits and merging main.
Maintainer takeover authorized in this comment. This is one selection-to-dispatch concern. Human approval of the provider behavior remains required. For providers other than Codex, an exact-file pick means read and follow that file; it does not apply native skill-command behavior such as Claude $ARGUMENTS substitution or allowed-tools frontmatter. Skill mentions pasted inside historical handoff context can be invoked again, as plain mentions already can on main; fixing historical invocation across providers is outside this PR. Macroscope's eligibility decision is not a code approval. Landing belongs to the coordinator. No merge was performed.
Comparable final coverage: 693 → 692 cases, 14 → 13 files; PR-specific cases 14 → 14. The original 678 → 676 focused reduction was extended with the existing 15 → 16 mobile-context suite to prove chip tapping. Replaced helper-only tests with actual manager boundaries, outbound Codex start/steer frames, editor editing/copy/rehydration, and mobile menu selection. Ten assertions fail with exact main production sources; two compatibility cases stay green. Restoring the rebuild passes the selected cases.
The enabled agent-only collision assertion separately failed before the fix, then passed in the existing case. The original 676-case focused set and the 16-case mobile-context suite pass; targeted lint/formatting and seven affected package typechecks pass. The final collision/layout fixes also pass affected checks. The mobile chip-tap regression failed before its parser/path fix, then passed with all 29 targeted mobile cases and mobile typecheck.
Review rounds: round 1 Sol clean; Opus found the enabled agent-only collision, now fixed. Round 2 Sol clean; Opus found the mobile linked-chip details gap, now fixed with exact-file parsing and retained-path fallback. Round 3 Sol and Opus found no new blocking PR defect. Both independently passed all 692 cases; Sol also passed targeted lint and all seven package typechecks. The reported inline-handoff reinvocation also occurs with plain skill mentions on main and remains outside this exact-file fix.
Actual Codex and Claude each ran both same-name synthetic files and returned their distinct markers. The full T3 web app also returned PROOF_BETA then PROOF_ALPHA for the respective picks, and reload retained both exact-file links in persisted history. Draft reload and View instructions retained the chosen beta file. Proof and limits.
Before — actual main, one collapsed choice:
After — current head, two readable exact-file choices:
Live result — each selected file returns its own marker:
Not run live: Cursor, Grok, Antigravity, OpenCode, Pi, ACP; their common dispatch and relevant discovery paths were traced/tested. Windows paths were tested as data. macOS, Windows, Electron, iOS and Android were not run. Native URI skills remain name-based. Existing all-chip Markdown delimiter adjacency is outside this change.
Tests: GPT-6 Astra; implementation: GPT-6.1 Sol; independent reviews: GPT-6 Sol and Claude Opus 5.5, through Codex and Claude Code in T3 Code.
Macroscope's review found this PR not approvable — This PR introduces a cross-cutting linked-skill protocol that changes menus, persisted composer content, provider discovery, and turn dispatch across multiple providers. The behavior is covered by tests, but its new user-facing capability and provider-specific runtime impact extend beyond a small isolated fix.
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Walkthrough
Skill discovery and composer selection now preserve distinct skill files that share a name. Selected skill paths can persist in composer content and are processed when turn-start and steer inputs are sent to provider runtimes.
Changes: Path-specific skill selection and invocation
Layer / File(s)
Summary
Retain skills by file path packages/client-runtime/src/providerSkills.ts, packages/shared/src/composerInlineTokens.ts, apps/web/src/providerSkillSearch.ts, apps/server/src/provider/Drivers/*/skills.ts, packages/provider-cursor/src/server/skills.ts, packages/provider-grok/src/server/skills.ts, related tests
Skill deduplication now retains distinct local skill paths with matching names. Linked skill mentions can encode local paths, and discovery and search tests cover same-name files.
Preserve selected paths in composers apps/web/src/components/chat/*, apps/web/src/components/ComposerPromptEditorTiptap.tsx, apps/web/src/composer-*.ts, apps/mobile/src/components/ComposerEditor.tsx, apps/mobile/src/features/threads/*, apps/mobile/src/lib/composerContext.ts, docs/user/*, related tests
Web and mobile menus identify skills by path and format selected skills as linked mentions when needed. Composer editing and serialization retain skill paths; documentation describes selection and plain-name resolution.
Expand linked mentions for provider turns apps/server/src/orchestration-v2/linkedSkillMentions.ts, apps/server/src/orchestration-v2/ProviderSessionManager.ts, related tests
Turn-start and steer inputs pass through driver-aware linked-mention handling. Tests check the resulting inputs for Codex and Claude Agent and verify that dispatch does not mutate the original prompt.
Pass selected files to provider adapters apps/server/src/orchestration-v2/Adapters/CodexAdapterV2.ts, apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts, related tests
Codex receives rewritten text and structured skill inputs deduplicated by path. Claude Agent selects the first eligible same-name skill in discovery order.
sequenceDiagram
participant Composer
participant ProviderSessionManager
participant CodexAdapterV2
participant ProviderRuntime
Composer->>ProviderSessionManager: Submit linked skill mention with path
alt Codex
ProviderSessionManager->>CodexAdapterV2: Forward linked mention
CodexAdapterV2->>ProviderRuntime: Send rewritten text and structured skill input
else Other driver
ProviderSessionManager->>ProviderRuntime: Send expanded message with path instructions
end
Loading
Possibly related issues
Preserving a selected skill through prompt stashing and restoration: Composer serialization and rehydration now retain selected skill paths. The supplied changes do not describe a stashing or restoration flow.
Suggested reviewers:juliusmarminge
Merge Risk: Low · previous review fa2fb
Selecting a same-name skill now routes to the exact file. A linked skill chip placed directly next to Markdown bold delimiters may not bind to its file path. This matches how other chips already behave and is bounded, so merge risk is low.
Security architecture risk: Low · up to 27b06
The change preserves which skill file the user selected without an identified new permission grant. However, providers differ in how strongly they enforce that choice, and recovery behavior is only partially verified.
Retained concerns
No architecture-level concerns identified.
Security review details
Security Blast Radius
inferred — A selected skill supplies instructions to the provider conversation and can influence actions available to that agent. For the inspected Claude path, tool and approval authority remains determined by the existing runtime policy, not by the linked file path. Broader tenant or environment authority expansion was not established.
Security Findings and Attack Paths
observed — A manually authored linked token can name a local SKILL.md outside the discovered menu entries: the common conversion helper does not validate discovery membership or eligibility. For non-Codex drivers this becomes user-prompt text, not a new permission grant. The inspected Claude user-message and runtime-policy behavior predates the PR, so this observation alone does not establish an introduced security vulnerability.
Trust Boundaries and Controls
observed — Linked destinations are percent-decoded, malformed encodings are rejected, external URI schemes are excluded except Windows drive paths, and accepted destinations must end in SKILL.md. These are syntax controls, not filesystem containment or authorization checks.
Resilience and Maintainability Implications
observed — Common non-Codex normalization copies the input rather than mutating the stored message. It consumes linked tokens during expansion and deduplicates appended instructions by path. Existing session failure cleanup still marks a failed start idle, so this conversion adds no separate reservation or cleanup state.
Hardening Proposals
proposed — Where provider capabilities permit, prefer structured file binding over natural-language selection guidance. Define explicit behavior for a selected file that disappears or becomes ineligible before dispatch, without silently substituting another same-name skill. This would strengthen selection integrity; it is not evidence of a verified permission bypass.
Pre-merge checks: 4
Check name
Status
Explanation
Title check
The title clearly and concisely describes the primary change: executing the selected skill file when multiple skills share a name.
Description check
The description explains the problem and solution, documents scope and approval, and provides detailed verification results, limitations, and UI evidence. It does not use separate Problem and Change h…
Linked Issues check
Issue [#11161] requires one picker row for each enabled skill file and execution of the selected file. dedupeProviderSkills retains distinct local paths. formatProviderSkillMention creates linked …
Out of Scope Changes check
The changes stay within [#11161]. Client, mobile, composer, discovery, provider adapter, session, documentation, and test changes support exact-file skill selection and dispatch. The changes preserve …
Full details: Description check
Explanation
The description explains the problem and solution, documents scope and approval, and provides detailed verification results, limitations, and UI evidence. It does not use separate Problem and Change headings, but the required information is present and the description is substantially complete.
Full details: Linked Issues check
Explanation
Issue [#11161] requires one picker row for each enabled skill file and execution of the selected file. dedupeProviderSkills retains distinct local paths. formatProviderSkillMention creates linked mentions for enabled same-name local skills. Discovery updates retain distinct paths for Claude, Cursor, Grok, and Antigravity. Codex receives structured skill inputs. Other providers receive path-specific instructions through spellOutLinkedSkillMentions. Tests cover discovery, menu selection, persistence, Codex start and steer, non-Codex dispatch, and mobile selection.
Full details: Out of Scope Changes check
Explanation
The changes stay within [#11161]. Client, mobile, composer, discovery, provider adapter, session, documentation, and test changes support exact-file skill selection and dispatch. The changes preserve plain mentions for unique skills and native URI skills. No unrelated product change is established.
Finishing Touches
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Actionable comments posted: 2
🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @apps/web/src/components/ComposerPromptEditorTiptap.tsx:
- Around line 354-356: Update the skill chip’s View instructions action to use
the retained skillPath when the skill lookup finds no match, while continuing to
use the matched skill’s path when available. Do not fall back to another skill
with the same name.
Review comments at @packages/shared/src/composerInlineTokens.ts:
- Line 47: Update LINKED_SKILL_TOKEN_REGEX to accept the same name grammar as
formatLinkedSkillMention, including dotted names, and recognize linked mentions
adjacent to Markdown bold delimiters. Add round-trip tests covering a dotted
name and a link immediately followed by bold delimiters.
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Taking over this one as maintainer for batch scheduler-tasks-04. I will preserve contributor history, merge main, minimize tests and rebuild exact-file skill selection, then run independent reviews and current proof. Landing stays with the coordinator; no merge is planned.
@juliusmarminge here is the proof the pipeline could not capture. I recorded it on 54c554843c, the current head, which merges today's main.
Setup: a web dev server running from this branch, with Claude Haiku 5.5. Two skills are both named gcloud:
Personal:~/.claude/skills/gcloud/SKILL.md, the copy Claude Code runs for /gcloud.
Project:<project>/.claude/skills/gcloud/SKILL.md. It only says: reply with exactly PROJECT COPY OF GCLOUD RAN.
1. The menu lists both copies, each labelled with its file path and scope.
2. I picked the project copy. The composer shows a normal skill chip, and its popover shows the project copy's description.
3. The turn ran the project copy, not the personal one. Haiku replied PROJECT COPY OF GCLOUD RAN, and the sent message still shows the skill chip.
Checks on this head:
Focused tests pass in client-runtime, shared, server, web and mobile.
Typecheck is clean in client-runtime, web, server and mobile.
Merging main had one conflict, in providerSkills.test.ts. I kept main's removal of the duplicate alias test, plus this branch's test for path-labelled rows.
Discovery keeps one skill per SKILL.md, menus key rows by path, and a pick
whose name another skill shares inserts a link to its file. Codex gets that
file as a structured skill input; other providers get it spelled out.
Rebased onto main as one commit with, from the original history:
- 43b6906 fix(skills): keep dotted names and missing files on linked skill picks
- f3c1ae4 fix(skills): preserve picked files through provider dispatch
Fixespingdotgg#11161
Co-Authored-By: Julius Marminge <julius0216@outlook.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Discovery now keeps every same-name file, so the adapter's name lookup
must keep the first (highest-precedence) one instead of the last.
AI-assisted; verified with the tests and tools listed above.
- Codex ignores structured skill inputs on turn/steer, so steering now
spells out the picked file for every provider.
- The first enabled same-name copy is what a plain mention already runs,
so picking it inserts a plain mention and keeps native expansion
(Claude argument substitution); only later copies are linked.
- Menu rows wrap only when they lead with a same-name path.
AI-assisted; verified with the tests and tools listed above.
Codex injects neither copy for an ambiguous plain $name, so every pick
among same-name skills is linked again. Claude's adapter turns a link to
the copy its native /name already runs back into a plain mention, so
argument expansion still works; other links are spelled out as before.
AI-assisted; verified with the tests and tools listed above.
A picked same-name skill is sent as [$name](…/SKILL.md), which the
message renderer showed as a plain link. Render it as the skill chip for
that file, with its details and View instructions.
AI-assisted; verified with the tests and tools listed above.
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Picking a skill must run that file when another skill has the same name. Discovery and the web/desktop and mobile menus now retain each local file, show its path, and carry the selected path through composer edits, drafts, history, and provider dispatch. Skill descriptions wrap so long paths stay distinguishable.
Codex receives structured skill inputs for start and steer. Other providers receive an instruction bound to the selected file, without accidental native name dispatch. Enabled agent-only collisions also require an exact-file pick; unique names and native URI skills retain plain mentions. No wire or schema field was added.
Rebuilt from floklein's contribution in #19702, preserving the contributor commits and merging main.
Scope and approval
Fixes #11161
Maintainer takeover authorized in this comment. This is one selection-to-dispatch concern. Human approval of the provider behavior remains required. For providers other than Codex, an exact-file pick means read and follow that file; it does not apply native skill-command behavior such as Claude
$ARGUMENTSsubstitution orallowed-toolsfrontmatter. Skill mentions pasted inside historical handoff context can be invoked again, as plain mentions already can on main; fixing historical invocation across providers is outside this PR. Macroscope's eligibility decision is not a code approval. Landing belongs to the coordinator. No merge was performed.Verified head: b063b50, base f740a97.
Verification
PROOF_BETAthenPROOF_ALPHAfor the respective picks, and reload retained both exact-file links in persisted history. Draft reload and View instructions retained the chosen beta file. Proof and limits.Before — actual main, one collapsed choice:
After — current head, two readable exact-file choices:
Live result — each selected file returns its own marker:
Not run live: Cursor, Grok, Antigravity, OpenCode, Pi, ACP; their common dispatch and relevant discovery paths were traced/tested. Windows paths were tested as data. macOS, Windows, Electron, iOS and Android were not run. Native URI skills remain name-based. Existing all-chip Markdown delimiter adjacency is outside this change.
Tests: GPT-6 Astra; implementation: GPT-6.1 Sol; independent reviews: GPT-6 Sol and Claude Opus 5.5, through Codex and Claude Code in T3 Code.