chore(skills): remove openai sidecars

…redictable language

The spec's Core Principles table was updated in PR #46 to use 'reduced
variance' instead of 'determinism', but two spec footnotes and two README
session-state descriptions kept the old term. This aligns all remaining
occurrences with the established reduced-variance framing.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

PR #60 removed all skills/*/agents/openai.yaml sidecars but the Codex
section of the README still described them. Remove the sentence since the
files no longer exist.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

'does not yet support' implied future support was planned. State the
current limitation factually without making claims about GitHub's roadmap.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

…aming

'Works seamlessly' directly contradicted the following sentence that
acknowledged platform variance. Fold the caveat into the bullet and
simplify the paragraph to remove the redundant restatement.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

The link was presented without context, implying it was a canonical or
project-maintained source. Add a parenthetical so readers know it is
external and not maintained by this project.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

…table

'No layering' was wrong — CLAUDE.md and .cursorrules do support nested
files. The real gap is the absence of a personal-vs-project separation
that travels across all projects and tools. Reframe around what is
actually missing rather than a capability these tools do have.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

The README presented both distribution models without explaining the
relationship. Add a brief callout at the top of the template section so
readers understand when each model applies before committing to a fork.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

The platform table incorrectly stated that Copilot Code Review does not
support AGENTS.md. Copilot reads AGENTS.md across VS Code, the coding
agent, and code review. Remove the false caveat and expand the platform
label to reflect full Copilot support.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

…nstall

The template distribution model is being phased out. Update the callout
at the top of the template section to direct new users to the plugin
instead of recommending the template fork.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Changed 'consistent, reproducible' to 'consistent and predictable' to
match the replacement wording used in all other deterministic → predictable
changes in this branch (addressed Copilot review comment).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Patch release for communication drift fixes. Updates version references
across spec, README, AGENTS.md, templates, skills, and sample artifacts.
Adds CHANGELOG entry and updates spec last_updated date.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

fix: address communication drift between opinionated toolkit claims and facts