GPT-5.x Codex models occasionally hallucinate malformed tool calls like:
assistant to=functions.XXX <garbled_unicode>json\n{...}
This is a model-level issue where the model outputs tool calls as text
instead of using the native tool calling mechanism. Add explicit prompt
instructions telling the model to use the tool call interface.
Related: #2190
The auto-commit section instructed Hephaestus to automatically commit after
implementation work. Users who didn't know about this behavior would get
surprise commits — a trust-breaking behavioral change flagged by 5 Oracle
reviews as the sole publish blocker for 3.9.0.
- fix(hooks): skip todo continuation when agent has pending question (#1888)
Add pending-question-detection module that walks messages backwards
to detect unanswered question tool_use, preventing CONTINUATION_PROMPT
injection while awaiting user response.
- fix(config): allow custom agent names in disabled_agents (#1693)
Change disabled_agents schema from BuiltinAgentNameSchema to z.string()
and add filterDisabledAgents helper in agent-config-handler to filter
user, project, and plugin agents with case-insensitive matching.
- fix(agents): change primary agents mode to 'all' (#1891)
Update Sisyphus, Hephaestus, and Atlas agent modes from 'primary'
to 'all' so they are available for @mention routing and task()
delegation in addition to direct chat.
Add Step 0 intent extraction to counter GPT 5.2's conservative grounding bias:
- Map surface questions to true action intent (e.g., "Did you do X?" → do X now)
- Verbalization pattern: model must state intent before acting, creating commitment
- Turn-end self-check to prevent stopping after only talking about work
Prevents Hephaestus from answering questions then stopping when action is implied.
Atlas and Sisyphus prompts instructed agents to use background_cancel(all=true)
before final answers. This destroys uncollected background task results and
contradicts existing NEVER directives in the Sisyphus prompt, causing agents
to lose explore/librarian outputs mid-session.
Replace with individual task cancellation pattern that preserves completed
task results while still cleaning up running disposable tasks.
- Restore Assumptions Check and When to Challenge the User from Sisyphus intent gate
- Add proactive explore/librarian firing to CORRECT behavior list
- Strengthen parallel execution with GPT-5.2 tool_usage_rules (parallelize ALL independent calls)
- Embed reporting into each Execution Loop step (Tell user pattern)
- Strengthen Progress Updates with plain-language and WHY-not-just-WHAT guidance
- Add post-edit reporting to Output Contract and After Implementation
- Fix Output Contract preamble conflict (skip empty preambles, but DO report actions)
Remove crash-causing name fields from 6 agent configs (sisyphus, hephaestus,
atlas, metis, momus, prometheus). The name field approach breaks opencode
because Agent.get(agent.name) uses name as lookup key.
Add getAgentConfigKey() to agent-display-names.ts for resolving display names
back to lowercase config keys (e.g. 'Atlas (Plan Executor)' -> 'atlas').
Expand prompt structure comment to 4-field format (CONTEXT/GOAL/DOWNSTREAM/REQUEST).
Update all explore/librarian task() examples across Sisyphus, Hephaestus,
Prometheus interview-mode, and both ultrawork variants with richer context
including downstream usage, scope limits, and return format expectations.
- Hephaestus: #FF4500 (Magma Orange) → #708090 (Slate Gray)
Blacksmith's hammer/iron theme, visible in both light and dark modes
- Prometheus: #9D4EDD (Amethyst Purple) → #FF5722 (Deep Orange)
Fire/flame theme, restoring the original fire color concept
* refactor(keyword-detector): split constants into domain-specific modules
* feat(shared): add requiresAnyModel and isAnyFallbackModelAvailable
* feat(config): add hephaestus to agent schemas
* feat(agents): add Hephaestus autonomous deep worker
* feat(cli): update model-fallback for hephaestus support
* feat(plugin): add hephaestus to config handler with ordering
* test(delegate-task): update tests for hephaestus agent
* docs: update AGENTS.md files for hephaestus
* docs: add hephaestus to READMEs
* chore: regenerate config schema
* fix(delegate-task): bypass requiresModel check when user provides explicit config
* docs(hephaestus): add 4-part context structure for explore/librarian prompts
* docs: fix review comments from cubic (non-breaking changes)
- Move Hephaestus from Primary Agents to Subagents (uses own fallback chain)
- Fix Hephaestus fallback chain documentation (claude-opus-4-5 → gemini-3-pro)
- Add settings.local.json to claude-code-hooks config sources
- Fix delegate_task parameters in ultrawork prompt (agent→subagent_type, background→run_in_background, add load_skills)
- Update line counts in AGENTS.md (index.ts: 788, manager.ts: 1440)
* docs: fix additional documentation inconsistencies from oracle review
- Fix delegate_task parameters in Background Agents example (docs/features.md)
- Fix Hephaestus fallback chain in root AGENTS.md to match model-requirements.ts
* docs: clarify Hephaestus has no fallback (requires gpt-5.2-codex only)
Hephaestus uses requiresModel constraint - it only activates when gpt-5.2-codex
is available. The fallback chain in code is unreachable, so documentation
should not mention fallbacks.
* fix(hephaestus): remove unreachable fallback chain entries
Hephaestus has requiresModel: gpt-5.2-codex which means the agent only
activates when that specific model is available. The fallback entries
(claude-opus-4-5, gemini-3-pro) were unreachable and misleading.
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Co-authored-by: justsisyphus <justsisyphus@users.noreply.github.com>
acamq