chore(dev): add .punt-labs/ethos.yaml + .claude/agents + commit .envrc

[claude-puntlabs]

Mirror of the dev-enablement work landing in anthropic-sdk-pharo (PR #17 there). Each Punt Labs repo gets its own ethos config + agent definitions so it can be developed directly, not just from the monorepo.

• .punt-labs/ethos.yaml — agent: claude, team: engineering
• .claude/agents/{adb,bwk,djb,kwb}.md — Pharo + ops scope (no rmh/kpz; Postern is Smalltalk + CLI tooling)
• .envrc — was untracked; now committed for parity

Also picks up a pre-existing local .gitignore line for .biff.local.

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Note

Low Risk
Low risk: adds repo-local developer tooling/config files and a .envrc that can change local shell environment, but no production/runtime code paths are modified.

Overview
Adds Punt Labs repo configuration via .punt-labs/ethos.yaml and a set of Claude agent definitions under .claude/agents/ (including PostToolUse hooks that run make check after Write|Edit).

Commits a shared .envrc to standardize local dev env vars (disabling telemetry/nonessential traffic and setting TMPDIR to .tmp), and updates .gitignore to ignore .biff.local.

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[Copilot]

Pull request overview

Adds Punt Labs repo-local dev-enablement configuration so this repository can be developed directly (outside the monorepo), including ethos metadata, Claude agent definitions, and a committed direnv environment file.

Changes:

• Add .punt-labs/ethos.yaml to declare agent/team metadata.
• Add .claude/agents/*.md agent definitions (adb/bwk/djb/kwb) with hooks to run make check after edits.
• Commit .envrc and extend .gitignore to ignore .biff.local.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
.punt-labs/ethos.yaml	Adds repo-local ethos agent/team configuration.
.gitignore	Ignores .biff.local.
.envrc	Adds shared Punt Labs direnv setup and telemetry/tmp env vars.
.claude/agents/adb.md	Adds infra/platform agent definition + make check hook.
.claude/agents/bwk.md	Adds Go-focused agent definition + make check hook.
.claude/agents/djb.md	Adds security-focused agent definition.
.claude/agents/kwb.md	Adds Smalltalk/TDD-focused agent definition + safety guidance.

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