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Release 2.0.26: read the Agent's resources only from .tau by default (ADR 0025) - #120
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Package the advisory composition and motion skill with its worked MetaTables example. Include both resources in distribution and clean-install checks and route the SDK guidance to it. Co-authored-by: Codex <codex@openai.com>
Tau, a coding-agent harness, read the repository's development instructions as the deployed Agent's: the root AGENTS.md and every AGENTS.md above the workspace were injected as project instructions, and since 2.0.15 every skill under .agents/skills, including the ms_tau_sdk, mainsequence and repository development bundles, was listed as one of the Agent's skills, expandable from chat with /skill:<name> and served by the skill-scoped read. The runtime now reads skills from .tau/skills, prompt templates from .tau/prompts and project instructions from .tau/AGENTS.md. The .agents project locations resolve to their .tau counterparts through the SDK's TauPaths, and Tau's AGENTS.md discovery is wrapped where tau_coding.session binds it, locked to tau-ai==0.4.2 like the provider patch of ADR 0016; another version fails session construction. TAU_INCLUDE_DEVELOPMENT_RESOURCES (default false) restores Tau's whole- repository reading for an Agent that is a coding agent over its own repository; like the two exclusion settings it is process-wide and applies to managed and local sessions. The selected system prompt files, context files and skills, and Tau's resource diagnostics, are logged as runtime.project_resources.* with workspace-relative paths and shown in agent inspection under "resources". Docs: ADR 0025, amendment notes on ADRs 0003, 0006 and 0011, the project configuration guide, quickstart, README, settings and compatibility references, the Security and access guide, the packaged tau_project_customization and tau_repository_integration skills, and the changelog with the migration note for repositories that kept runtime skills under .agents/skills. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
The merge of development into main is the release, and the release workflow requires the declared version to head CHANGELOG.md. pyproject.toml already declares 2.0.26, which is not on PyPI. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Summary
The deployed Agent reads its resources only from
.tau/by default (ADR 0025).Tau, a coding-agent harness, also read the repository's development instructions as the Agent's: the root
AGENTS.mdand everyAGENTS.mdabove the workspace were injected as project instructions, and since 2.0.15 every skill under.agents/skills(thems_tau_sdk,mainsequenceand repository development bundles) was listed as one of the Agent's skills, expandable from chat with/skill:<name>and served by the skill-scopedread. Measured on the CRM repository: 35 of 36 skills and 15k of a 39k-character system prompt were development material contradicting.tau/SYSTEM.md.Changes
.tauonly. Skills from.tau/skills, prompt templates from.tau/prompts, project instructions from.tau/AGENTS.md. The.agentsproject locations resolve to their.taucounterparts through the SDK'sTauPaths; Tau'sAGENTS.mddiscovery is wrapped wheretau_coding.sessionbinds it, locked totau-ai==0.4.2like the ADR 0016 provider patch (another version fails session construction).TAU_INCLUDE_DEVELOPMENT_RESOURCES(defaultfalse) restores Tau's whole-repository reading for an Agent that is a coding agent over its own repository. Process-wide, managed and local sessions alike, independent of the two exclusion settings.runtime.project_resources.*with workspace-relative paths and shown in agent inspection underresources.tau_project_customizationandtau_repository_integrationskills; changelog with the migration note.Migration for consuming repositories
A repository whose Agent used skills under
.agents/skillsat runtime moves them directly into.tau/skillsand, when it publishes them with the mainsequence SDK'sskills_extension, points the publisher at.tau/skills; the publisher's folder rules then apply to the whole folder, and a skill folder cannot share its name with a group folder. Instructions for the Agent that lived in the rootAGENTS.mdmove to.tau/AGENTS.md.ms-tau skills syncand the development workflow are unchanged.Verification
pytest tests/unit tests/contract: 1133 passed.ruff check,ruff format --check,mypyon the changed sources: clean.🤖 Generated with Claude Code