Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Added

• GitHub Copilot Enterprise provider (:github-copilot-enterprise). The provider extension already shipped the enterprise base-url, provider id, label, and account type, but only registered :individual + :business, so Copilot Enterprise users could not select Claude Opus 4.8 / Sonnet 4.6 / Haiku 4.5 at all. Enterprise now registers alongside the other tiers and inherits the same curated catalog: dotted models.dev ids (claude-opus-4.8, claude-sonnet-4.6, claude-haiku-4.5) over the native Anthropic /v1/messages wire (never /chat/completions).
• Extension system with global registry, topo-sort, hot-reload
• :ext/nudge-fn for per-iteration system nudges from extensions
• :ext/requires for extension dependency declaration
• :ext/version, :ext/author, :ext/license metadata
• register-global!, load-extension!, reload-extension!
• extensions/common/vis-foundation package (read, list, grep, patch)
• mdBook documentation at https://blockether.github.io/vis/
• Iteration metadata stores active extensions (namespace + version)
• Apache-2.0 license

Changed

• Default reasoning level: :balanced (was :quick)
• create-env -> create-environment
• dispose-env! -> dispose-environment!
• vis! -> query!
• register-env-def! removed (use extensions)
• Nudges moved from loop/nudges.clj to loop/runtime/prompt.clj
• session/shared.clj folded into session/core.clj

Removed

• var-diff (dead code)
• restore-var references (never existed as callable tool)
• Scattered .md files (consolidated into resources/docs/)
• Built-in repetition [system_nudge] ("You repeated the same expression ..."). <journal> + the dedup cache (:cached? true) already give the model enough signal to change strategy; the nudge was noise. Drops repetition-warning, REPETITION_THRESHOLD, the call-counts-atom plumbing, and the :call-counts-atom arg to prompt/build-iteration-context.

Fixed

• GitHub Copilot Claude requests returning 404 page not found. The token exchange's authoritative endpoints.api (and the account fallback hosts) are bare roots with no /v1, so provider-token-base-url handed svar a versionless base and Claude hit {host}/messages instead of {host}/v1/messages. The token's LLM base is now suffixed with /v1 at exchange time (idempotent ensure-api-version) and reused from cache, while the model-policy call still targets the root host. Affects all Copilot tiers (individual/business/enterprise), since every account's token endpoint resolves to the same versionless host.
• github-copilot-provider-id? omitted :github-copilot-enterprise, so enterprise models were filtered out of the visible catalog mapping.