This release adds 3 notable features for engineering teams evaluating rollout.
✓ No known CVEs patched in this version
Topics
+2 more
Summary
AI summaryAdds support for Anthropic's Fable 5 model and an agent‑model override in the config.
Changes in this release
| Type | Severity | Summary | CVE |
|---|---|---|---|
| Feature | Medium |
Adds support for Anthropic's Fable 5 model (`claude-fable-5`). Adds support for Anthropic's Fable 5 model (`claude-fable-5`). Source: llm_adapter@2026-06-10 Confidence: high |
— |
| Feature | Medium |
Introduces `agent-model: fable` override in `~/.great_cto/config` to pin agents to Fable 5. Introduces `agent-model: fable` override in `~/.great_cto/config` to pin agents to Fable 5. Source: llm_adapter@2026-06-10 Confidence: high |
— |
| Feature | Medium |
Recognizes `fable` / `claude-fable-5` as the newest deepest tier in lint policy, accepted where Opus is allowed. Recognizes `fable` / `claude-fable-5` as the newest deepest tier in lint policy, accepted where Opus is allowed. Source: llm_adapter@2026-06-10 Confidence: high |
— |
| Feature | Medium |
Board agent runner passes `--model` verbatim, enabling `claude-fable-5` without additional changes. Board agent runner passes `--model` verbatim, enabling `claude-fable-5` without additional changes. Source: llm_adapter@2026-06-10 Confidence: high |
— |
| Bugfix | Low |
Verifies agent-model override e2e: repins to `model: fable` and rejects invalid values. Verifies agent-model override e2e: repins to `model: fable` and rejects invalid values. Source: llm_adapter@2026-06-10 Confidence: high |
— |
| Bugfix | Low |
Ensures lint tier policy correctly handles 6/6 Fable 5 cases. Ensures lint tier policy correctly handles 6/6 Fable 5 cases. Source: llm_adapter@2026-06-10 Confidence: high |
— |
| Bugfix | Low |
Confirms library compatibility: 348/348 tests pass with Fable 5. Confirms library compatibility: 348/348 tests pass with Fable 5. Source: llm_adapter@2026-06-10 Confidence: high |
— |
Full changelog
Adds support for Anthropic's newest model, Fable 5 (claude-fable-5):
- Agent-model override —
agent-model: fablein~/.great_cto/configpins every managed agent/command to Fable 5 (alongsideopus|sonnet|haiku). - Lint tier policy —
fable/claude-fable-5recognised as the newest deepest tier: accepted anywhere the policy allows opus; still flagged for haiku-only utility agents. - The board agent runner passes
--modelthrough verbatim, soclaude-fable-5already works there with no change.
Verified: override e2e (repins to model: fable, rejects bogus values), 6/6 lint tier cases, lib 348/348.
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About great_cto
Engineering-management layer of 34 specialist AI agents covering the full SDLC (architect, PM, senior-dev, reviewer, QA, security, devops, L3-support + 18 archetype-specific reviewers) with auto-detected archetypes and compliance gates (PCI-DSS, HIPAA, FedRAMP, GDPR, EU AI Act). Runs in Claude Code, Cursor, Codex CLI, Aider, and Continue via AGENTS.md + MCP. MIT.
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- v2.72.2 Removes Autopilot sidebar item and Operate topbar button from dev board.
- v2.55.0 Hard-gates the Build board; redirects invite sessions to Operate for operators.
- v2.43.0 Runtime now blocks autonomous execution of irreversible actions without prior human checkpoint.
- v2.43.0 Adds reversible and blastRadius fields to every flow step.
- v2.32.0 Removed AgentShield scanner and its CLI commands.
Beta — feedback welcome: [email protected]