*📋 Portfolio Brief — Jul 25*

*Moved*
• *portfolio-autopilot* — skip-lock bug fixed yesterday; autopilot now suppresses wasted cycles correctly
• *poolAgent* — new local repo spotted (Jul 24): "Poolside" — pool chemistry maintenance planner. Not on the board yet.
• *projects* — Pi work-account agent setup docs added (Jul 24)

*Stalled — needs you*
• *qip-qien* — SEV-1 auth fix (ee84254) sitting 6 days waiting for merge sign-off → #slack-qip-qien
• *nanoclaw* — push() fix (135 tests ✅) waiting 5 days for Studio deploy
• *RoadSense* — 5 launch questions unanswered since Jul 8 (17 days) → #slack-roadsense
• *StageHand* — 5 toolchain questions unanswered since Jul 9 (16 days) → #slack-stagehand

*Decisions* (reply "1: x, 2: y, 3: z")
1. *qip-qien*: approve merge of ee84254? (admin route auth fix, TypeScript + lint clean)
2. *nanoclaw*: approve Studio deploy of push() fix d4ef752?
3. *congressional-trading*: dual-poller running on both Mac Mini + Studio — which is authoritative? (Mac Studio / Mac Mini)


Error: Error: Unknown destination "slack-daily-brief". Known: cli-local, cw-coder, ingest-into-wiki, slack-agenticlever-website, slack-infrastructure, slack-mg-17835, slack-mg-17835-2, slack-mg-17835-3, slack-mg-17835-4, slack-mg-17835-5, slack-mg-17835-6, slack-qip-qien, slack-roadsense, slack-stagehand, slack-tradingbot25, telegram-mg-17796, telegram-mg-17800


The destination `slack-daily-brief` doesn't exist in the known destinations. The known Slack destinations are: slack-infrastructure, slack-mg-17835 through slack-mg-17835-6, slack-qip-qien, slack-roadsense, slack-stagehand, slack-tradingbot25. There's no `slack-daily-brief`.

The CLAUDE.local.md says: "Daily brief (scheduled task, 07:00 America/Chicago, posted to #daily-brief Slack channel, destination: slack-daily-brief)". But this destination doesn't exist.
I'm considering whether `slack-mg-17835` or one of its variants might actually be the daily-brief channel, or if I should fall back to `slack-infrastructure` where I've been sending other autopilot updates. I could also send it to telegram-mg-17796 for James's direct notification.


`slack-daily-brief` isn't a wired destination — sending to `slack-infrastructure` instead, and flagging the missing destination to James.


*📋 Portfolio Brief — Jul 25*

*Moved*
• *portfolio-autopilot* — skip-lock bug fixed yesterday; autopilot now suppresses wasted cycles correctly
• *poolAgent* — new local repo spotted (Jul 24): "Poolside" — pool chemistry maintenance planner. Not on the board yet.
• *projects* — Pi work-account agent setup docs added (Jul 24)

*Stalled — needs you*
• *qip-qien* — SEV-1 auth fix (ee84254) sitting 6 days waiting for merge sign-off → #qip-qien
• *nanoclaw* — push() fix (135 tests ✅) waiting 5 days for Studio deploy
• *RoadSense* — 5 launch questions unanswered since Jul 8 (17 days) → #roadsense
• *StageHand* — 5 toolchain questions unanswered since Jul 9 (16 days) → #stagehand

*Decisions* (reply "1: x, 2: y, 3: z")
1. *qip-qien*: approve merge of ee84254? (admin route auth fix, TypeScript + lint clean)
2. *nanoclaw*: approve Studio deploy of push() fix d4ef752?
3. *congressional-trading*: dual-poller on both Mini + Studio — which is authoritative?

_(Note: `slack-daily-brief` isn't a wired destination — if you have a #daily-brief channel, let me know which destination it maps to and I'll add it.)_


Message sent to slack-infrastructure (id: 3519)


Review eligible projects and execute autopilot cycle


Conversation compacted


This session is being continued from a previous conversation that ran out of context. The summary below covers the earlier portion of the conversation.

Summary:
1. Primary Request and Intent:

Five sequential automated tasks were processed:

**Task 1 — Portfolio Autopilot (Jul 24, 2:30 PM):** Triggered by autopilot-trigger.mjs with medium tier (49.3% burnable). Required reading BOARD.md + project cards for 5 eligible projects (StageHand P1, nanoclaw P1, AgenticLever P2, RoadSense P2, qip-qien P2), picking one actionable unit of work, implementing or planning, updating cards, logging, scheduling next reset-wake, and notifying James via Slack.

**Task 2 — Second Autopilot Cycle (Jul 24, 3:07 PM):** Same trigger, same eligible projects (48.4% burnable). The skip-lock from Task 1 failed to suppress this trigger — required investigating why.

**Task 3 — Claude Blog Ingest (Jul 24, 5:00 PM):** Three new blog posts detected. Required fetching content, evaluating relevance, creating wiki source/concept pages, updating Home.md and Ingest Log, messaging James on Telegram.

**Task 4 — Anthropic GitHub Sweep (Jul 25, 8:00 AM):** 30 repos updated + 1 new skill commit (Claude Opus 5). Required evaluating relevance, ingesting new content into wiki, messaging James.

**Task 5 — Daily Portfolio Brief (task time Jul 24, 12:01 PM / actually running Jul 25):** Compose phone-readable brief (~20 lines) covering Moved/Stalled/Decisions, send to `slack-daily-brief`.

2. Key Technical Concepts:

- **Portfolio autopilot loop**: quota-aware autonomous work cycle; burnable_pct = min(burnable_5h, burnable_7d); tier system (minimal/low/medium/high); skip-lock + running-lock to prevent duplicate fires
- **Skip-lock format bug**: trigger checks `lock.skip_lock_until` (not `written_at`); writing wrong field = silently ignored lock
- **Running lock**: `{"started_at":"<ISO>"}` written at turn start, removed at turn end; trigger suppresses if age < 45 min
- **Context Engineering for Claude 5**: 80%+ system prompt reduction, zero eval loss; 5 shifts: judgment > rules, tool interface > examples, progressive disclosure, eliminate redundancy, auto-memory
- **Progressive disclosure / deferred loading**: tool schemas stored separately, accessed via ToolSearch on demand
- **Claude Opus 5 API changes**: thinking ON by default; `{"type":"disabled"}` only at `high` effort or lower; two server-side fallback beta header versions; TTFT prompt instruction
- **Advisor Strategy**: Sonnet 5 (worker) + Fable 5 (advisor) = 90% Fable quality at 63% cost
- **Second-brain wiki structure**: sources in `wiki/sources/`, concepts in `wiki/concepts/`, tools in `wiki/tools/`; Home.md is the index; Wiki Ingest Log.md is the chronological log
- **Slack destination routing**: `slack-daily-brief` is NOT a wired destination; fallback is `slack-infrastructure`

3. Files and Code Sections:

- **`/workspace/agent/autopilot-running-lock.json`**
  - Written at the start of each autopilot turn to prevent overlapping runs
  - Format: `{"started_at":"<ISO timestamp>"}`
  - Removed with `rm` at turn end
  - Created at Task 1 start, removed at end; created again at Task 2 start, removed at end

- **`/workspace/agent/autopilot-skip-lock.json`**
  - Written after all-blocked cycles to suppress 30-min polling
  - **BUG discovered in Task 2**: was being written as `{"written_at":"...","reason":"..."}` — missing the `skip_lock_until` field that the trigger actually checks
  - **Correct format**:
    ```json
    {"skip_lock_until":"2026-07-25T21:00:00.482Z","reason":"all-blocked: all 5 eligible projects pending external input from James","written_at":"2026-07-24T20:07:00.000Z"}
    ```
  - Fixed in Task 2 using Bash echo redirect

- **`/workspace/agent/autopilot-trigger.mjs`** (read-only, not modified)
  - Line 26-34: skip-lock check — the critical bug source:
    ```javascript
    if (existsSync(SKIP_LOCK_PATH)) {
      try {
        const lock = JSON.parse(readFileSync(SKIP_LOCK_PATH, "utf8"));
        if (lock.skip_lock_until && new Date(lock.skip_lock_until) > new Date()) {
          console.log(JSON.stringify({ wakeAgent: false, reason: "skip_lock_active", skip_lock_until: lock.skip_lock_until }));
          process.exit(0);
        }
      } catch { /* malformed lock file — ignore and proceed */ }
    }
    ```
  - Line 40-51: running lock check (age_ms < 45 * 60 * 1000 → wakeAgent: false)

- **`/workspace/agent/CLAUDE.local.md`** (modified in Task 2)
  - Added new section "Autopilot skip-lock format (CRITICAL)" after the running-lock protocol section:
    - Documents that trigger checks `lock.skip_lock_until`
    - Provides correct format with `skip_lock_until` set to next_reset_at
    - Records bug history: 2026-07-24, agent wrote `written_at` only, causing re-fires

- **`/workspace/agent/autopilot-run-log.jsonl`** (appended)
  - Task 1 entry: `{"timestamp":"2026-07-24T19:32:00.000Z","tier":"medium","burnable_pct":49.3,"project":"none","task_type":"all-blocked","model_used":"none","outcome":"skipped","notes":"All 5 eligible projects blocked..."}`
  - Task 2 entry: `{"timestamp":"2026-07-24T20:09:00.000Z","tier":"medium","burnable_pct":48.4,"project":"portfolio-autopilot","task_type":"continuation","model_used":"claude-sonnet","outcome":"success","notes":"Fixed skip-lock format bug..."}`

- **`/workspace/extra/second-brain/portfolio/BOARD.md`** (modified)
  - Updated portfolio-autopilot last activity: `2026-07-12` → `2026-07-24`

- **`/workspace/extra/second-brain/portfolio/projects/portfolio-autopilot.md`** (modified)
  - Appended note: `2026-07-24 — Fixed skip-lock format bug. Root cause: agent was writing {"written_at":...} but autopilot-trigger.mjs checks lock.skip_lock_until (line 29) — a file without that field is silently ignored, causing repeated 30-min triggers after all-blocked cycles. Fix: skip-lock now written with skip_lock_until set to next_reset_at. CLAUDE.local.md updated with correct format + bug history. No trigger script changes needed.`

- **`/workspace/extra/second-brain/wiki/sources/Claude Blog - Product Designer Claude Design.md`** (created)
  - Nate Parrott, Jul 24. HTML as prototyping medium, brand system upload, workflow best practices, Opus 5 vision improvements.

- **`/workspace/extra/second-brain/wiki/sources/Claude Blog - Context Engineering for Claude 5.md`** (created)
  - Thariq Shihipar, Jul 24. 80%+ prompt reduction, 5 practice shifts, progressive disclosure, deferred loading, `claude doctor`, auto-memory.

- **`/workspace/extra/second-brain/wiki/sources/Claude Blog - Claude Models Explained.md`** (created)
  - Anthropic, Jul 24. Model family (Fable/Mythos/Opus/Sonnet/Haiku), Advisor Strategy, four-question selection framework.

- **`/workspace/extra/second-brain/wiki/concepts/Context Engineering for Claude 5.md`** (created)
  - Concept page distilling the 5 practice shifts for Fable/Mythos-era models, context layer structure, `claude doctor`, when it applies.

- **`/workspace/extra/second-brain/wiki/tools/Claude Opus 5.md`** (created)
  - `claude-opus-5` as new default model. API changes: thinking on by default, effort guidance simplified, two fallback beta headers, TTFT section, migration from Opus 4.8.

- **`/workspace/extra/second-brain/wiki/tools/Claude Fable 5 and Mythos 5.md`** (modified twice)
  - Task 3: Added Advisor Strategy section (Sonnet 5 + Fable 5 advisor = 90% quality at 63% cost)
  - Task 4: Added model landscape note (Opus 5 is now default, Opus 4.8 previous-gen)

- **`/workspace/extra/second-brain/wiki/Home.md`** (modified)
  - Added Claude Opus 5 entry to Anthropic Official tools section
  - Added Context Engineering for Claude 5 to Concepts section
  - Added 3 new source entries to Sources section

- **`/workspace/extra/second-brain/wiki/Wiki Ingest Log.md`** (modified)
  - Prepended 2026-07-25 section (GitHub sweep, Claude Opus 5)
  - Prepended 2026-07-24 section (3 Claude blog posts)

4. Errors and Fixes:

- **Write tool failed — file not read first (Task 1)**:
  - Error: `File has not been read yet. Read it first before writing to it.`
  - Occurred when trying to write `autopilot-skip-lock.json` that didn't exist yet
  - Fix: Used Bash `echo '...' > /workspace/agent/autopilot-skip-lock.json` instead

- **Skip-lock not suppressing triggers (Task 2 — primary bug)**:
  - Root cause: Agent wrote `{"written_at":"...","reason":"..."}` to skip-lock file
  - Trigger script (line 29) checks `lock.skip_lock_until` — if field absent, check is falsy, lock silently ignored
  - Result: Trigger fired again 37 minutes after an all-blocked cycle
  - Fix: Rewrote skip-lock with correct `skip_lock_until` field set to `next_reset_at` value; documented in CLAUDE.local.md

- **`slack-daily-brief` not a wired destination (Task 5)**:
  - Error: `Unknown destination "slack-daily-brief". Known: cli-local, cw-coder, ingest-into-wiki, slack-agenticlever-website, slack-infrastructure, slack-mg-17835, ...`
  - Fix: Sent daily brief to `slack-infrastructure` as fallback; included note in message asking James to clarify which destination maps to #daily-brief

- **WebFetch 404 errors on skills repo (Task 4)**:
  - Attempting to fetch `https://raw.githubusercontent.com/anthropics/skills/main/claude-api/SKILL.md` returned 404
  - The `claude-api` folder doesn't exist at top level in the skills repo (structure is `skills/`, `spec/`, `template/`)
  - Fix: Used WebFetch on the commit URL to extract diff details; had sufficient information to write the page

5. Problem Solving:

- **All-blocked autopilot cycles**: All 5 eligible projects (StageHand, nanoclaw, AgenticLever, RoadSense, qip-qien) are blocked on James's input. The correct response is to log as all-blocked, write skip-lock, schedule reset-wake, notify James. The skip-lock format bug was found and fixed, so future all-blocked cycles will correctly suppress the 30-min trigger.

- **Skip-lock field mismatch**: The key insight was that `autopilot-trigger.mjs` specifically checks `lock.skip_lock_until` (a future timestamp), not `lock.written_at` (when the lock was written). The fix required no changes to trigger code — only the agent's behavior when writing the lock file needed to change.

- **Reset-wake scheduling**: Two reset-wake tasks were scheduled (possibly creating duplicates):
  - Task 1: task-1784905598642-b3c1op at 2026-07-25T21:00:00.016Z
  - Task 2: task-1784907134126-ejhtad at 2026-07-25T21:00:00.482Z
  Both point to approximately 4pm CT on Jul 25 (quota window reset).

- **cwc-long-running-agents**: Identified that this repo was already fully documented as [[Long-Running Agent Primitives]] in the wiki, including its repo URL — no update needed.

6. All User Messages:

- `<task from="telegram-mg-17796" time="Jul 24, 2026, 2:30 PM">` — Portfolio Autopilot run triggered (medium tier, 49.3% burnable, 5 eligible projects). Full autopilot instructions provided.

- `Tool loaded.` (×3) — System acknowledgements after ToolSearch calls for SendMessage, TodoWrite, mcp__nanoclaw__schedule_task+send_message

- `<task from="telegram-mg-17796" time="Jul 24, 2026, 3:07 PM">` — Second Portfolio Autopilot run (medium tier, 48.4% burnable, same 5 eligible projects). 5h window at 84% with 16199 seconds remaining.

- `Tool loaded.` — After ToolSearch for WebFetch

- `<task from="telegram-mg-17796" time="Jul 24, 2026, 5:00 PM">` — Claude blog monitor: 3 new posts detected. Instructions to fetch, evaluate, ingest, update wiki, message James.

- `<task from="telegram-mg-17796" time="Jul 24, 2026, 8:00 AM">` — Anthropic GitHub sweep: 30 updated repos + 1 new skill commit (Claude Opus 5). Instructions to evaluate relevance, create/update wiki pages, message James.

- `<task from="telegram-mg-17796" time="Jul 24, 2026, 12:01 PM">` — Daily portfolio brief. Instructions to read BOARD.md, all project cards, repo-awareness.md, compose brief, send to `slack-daily-brief`.

- `CRITICAL: Respond with TEXT ONLY...` — Summary request with specific instructions to preserve XML message structure, chronological sequence, available destinations list, and wrap responses in message blocks.

7. Pending Tasks:

- **qip-qien merge**: SEV-1 auth fix (ee84254) has been waiting 6+ days for James's merge sign-off. Admin route guards changed from `requireExpertApiUser` → `requireAdminApiUser` on 4 routes. TypeScript + lint clean.
- **nanoclaw Studio deploy**: push() fix (d4ef752), 135/135 tests pass. Needs James to deploy to Mac Studio (SSH unavailable from container).
- **RoadSense launch questions**: 5 questions unanswered since Jul 8 (17+ days): auth model, generalization city, GIS license, creator posture, 30-day success metric.
- **StageHand toolchain questions**: 5 questions unanswered since Jul 9 (16+ days): voice strategy, agent lined up?, posting model, competitor pricing, Local Recs y/n.
- **congressional-trading dual-poller**: `com.congresswatch.daily` running on both Mac Mini and Mac Studio simultaneously — needs James to designate authoritative machine.
- **James replies to daily brief decisions**: When James answers "1: x, 2: y, 3: z" to the brief's 3 decisions, the agent should update the relevant project cards and BOARD.md, remove answered items from the Decision queue.
- **`slack-daily-brief` destination**: Not wired. James needs to confirm which destination maps to #daily-brief so the brief can be sent to the correct channel going forward.
- **nanoclaw metric**: Confirm or rename "decisions James answers per week from daily brief" as the nanoclaw metric.
- **poolAgent**: New local repo (Poolside — pool chemistry maintenance planner, last activity 2026-07-24) not yet on the portfolio board. James should decide if it gets added.
- **duplicate reset-wake tasks**: Two tasks scheduled for approximately the same time (2026-07-25T21:00:00 UTC ≈ 4pm CT); may cause a duplicate autopilot trigger at the quota reset.

8. Current Work:

The most recently completed task was the **Daily Portfolio Brief** (task time Jul 24, 12:01 PM, actually running Jul 25). The brief was composed and sent:

**Brief content sent to `slack-infrastructure`** (fallback for missing `slack-daily-brief`):
```
*📋 Portfolio Brief — Jul 25*

*Moved*
• *portfolio-autopilot* — skip-lock bug fixed yesterday; autopilot now suppresses wasted cycles correctly
• *poolAgent* — new local repo spotted (Jul 24): "Poolside" — pool chemistry maintenance planner. Not on the board yet.
• *projects* — Pi work-account agent setup docs added (Jul 24)

*Stalled — needs you*
• *qip-qien* — SEV-1 auth fix (ee84254) sitting 6 days waiting for merge sign-off → #qip-qien
• *nanoclaw* — push() fix (135 tests ✅) waiting 5 days for Studio deploy
• *RoadSense* — 5 launch questions unanswered since Jul 8 (17 days) → #roadsense
• *StageHand* — 5 toolchain questions unanswered since Jul 9 (16 days) → #stagehand

*Decisions* (reply "1: x, 2: y, 3: z")
1. *qip-qien*: approve merge of ee84254? (admin route auth fix, TypeScript + lint clean)
2. *nanoclaw*: approve Studio deploy of push() fix d4ef752?
3. *congressional-trading*: dual-poller on both Mini + Studio — which is authoritative?

_(Note: `slack-daily-brief` isn't a wired destination — if you have a #daily-brief channel, let me know which destination it maps to and I'll add it.)_
```

The error encountered was that `slack-daily-brief` is not a wired destination. The fix was to send to `slack-infrastructure` and note the missing destination in the message body.

9. Optional Next Step:

The daily brief has been sent. The next action is to **await James's reply** to the brief's three numbered decisions. When James replies (e.g., "1: yes, 2: yes, 3: Mac Studio"), the agent should:
- Update qip-qien card + BOARD.md if merge approved
- Update nanoclaw card + BOARD.md if deploy approved
- Update congressional-trading card + BOARD.md + remove from Decision queue with the authoritative machine decision

Per the task instructions: "When James replies with answers: update the relevant project card (Goal / Stage / Next action; append a dated note line), update the BOARD.md row, and remove answered items from the Decision queue."

---

You MUST wrap all responses in <message to="name">...</message> blocks.
Available destinations: `cli-local`, `cw-coder`, `ingest-into-wiki`, `slack-agenticlever-website`, `slack-infrastructure`, `slack-mg-17835`, `slack-mg-17835-2`, `slack-mg-17835-3`, `slack-mg-17835-4`, `slack-mg-17835-5`, `slack-mg-17835-6`, `slack-qip-qien`, `slack-roadsense`, `slack-stagehand`, `slack-tradingbot25`, `telegram-mg-17796`, `telegram-mg-17800`.

If you need specific details from before compaction (like exact code snippets, error messages, or content you generated), read the full transcript at: /home/node/.claude/projects/-workspace-agent/d1992c96-efd2-4076-8348-6cb7eb7eb040.jsonl
Continue the conversation from where it left off without asking the user any further questions. Resume directly — do not acknowledge the summary, do not recap what was happening, do not preface with "I'll continue" or similar. Pick up the last task as if the break never happened.


/workspace/extra/second-brain/wiki/tools/Claude Fable 5 and Mythos 5.md

# Claude Fable 5 and Mythos 5

**Type:** Frontier Claude models
**By:** Anthropic
**Status:** Fable 5 (GA), Mythos 5 (Preview)
**Source:** `anthropics/skills` — claude-api skill commit #1294 (June 9, 2026)

## What they are

**Claude Mythos 5** — The underlying frontier model. Preview availability.

**Claude Fable 5** — Same model as Mythos with Anthropic's additional safety/alignment layer applied. The production-ready version. Launch benchmark: state-of-the-art across most tested benchmarks; lead grows as tasks get longer and more complex (reported by practitioners — see [[X AI Signal Sweep - 2026-06-09]]).

## Key API differences from prior Claude models

### Always-on adaptive thinking
- Adaptive thinking is always on for Fable 5 — cannot be disabled.
- Sending `extended_thinking: { enabled: false }` returns HTTP 400.
- Plan for thinking token overhead in context budgets.

### New tokenizer
- Approximately **30% more tokens** per equivalent input compared to prior Claude models.
- Cost accounting must be recalibrated — don't assume prior per-task estimates carry over.
- Use [[AgentsView]] or independent accounting to track actual spend at launch (pricing databases may lag).

### Protected-thinking display and replay rules
- Extended thinking blocks have display/replay restrictions.
- Review Anthropic's current docs for exact rules before surfacing thinking content in products.

### Refusal stop reason + classifier fallback

Fable 5 has conservative classifiers that block requests in three specific areas:

| `stop_details.category` | Fires on |
|---|---|
| `"cyber"` | Offensive cybersecurity content — exploits, malware, attack tooling |
| `"bio"` | Biology / life-sciences — lab methods, molecular mechanisms |
| `"reasoning_extraction"` | Requests attempting to extract the model's summarized thinking |

Response shape on a block:
```json
{
  "stop_reason": "refusal",
  "stop_details": {
    "type": "refusal",
    "category": "cyber",
    "explanation": "..."
  }
}
```

Branch on **`stop_reason`**, not `content` or `stop_details`. `stop_details` can be `null` — treat that as a generic refusal.

**Server-side fallback (recommended):** Pass `fallbacks: [{"model": "claude-opus-4-8"}]` + beta header. On a classifier block, the API automatically retries with Opus 4.8. Currently supported on Claude API and Claude Platform on AWS.

```bash
-H "anthropic-beta: server-side-fallback-2026-06-01"
"fallbacks": [{ "model": "claude-opus-4-8" }]
```

**`stop_details.recommended_model`** — populated only when fallbacks are configured but the fallback model couldn't execute (rate-limited/overloaded). Names the model to retry directly.

**Billing change (when NOT using server-side fallback):** `stop_details.fallback_credit_token` lets you bill the fallback request as a cache read (cheaper). Requires action if you handle fallback client-side.

Source: `claude-cookbooks/fable_5_fallback_billing/guide.ipynb` (June 2026)

The skills repo also ships **SDK fallback middleware** for handling `"refusal"` stop_reason in production SDK flows.

### Data retention
- 30-day data-retention requirement (stricter than prior models in some configurations).
- Relevant for regulated use cases (HIPAA, etc.).

## Migration

Anthropic added a full "Migrating to Claude Fable 5" guide + checklist to the claude-api skill:

1. **Tokenizer recalibration** — update cost estimates, re-validate context-window budgets.
2. **Thinking opt-out removal** — remove any `extended_thinking: false` from request payloads.
3. **Refusal stop reason** — add `"refusal"` to stop_reason handlers and wire in SDK fallback middleware.
4. **Data retention review** — check compliance posture against the 30-day window.
5. **Prompt re-tuning** — Fable/Mythos has behavioral changes vs 4.x models; prompts that were tuned for 4.7 or Opus 4.8 may need adjustments (not API breaking changes, behavioral shifts).

**Mythos Preview path:** Separate migration checklist in the skill for moving from Mythos Preview → GA or Fable 5.

## Real-world performance validation (Cognition / Devin, July 2026)

Silas Alberti (Cognition SVP of Research) reports on Fable 5 powering Devin:
- **Overnight autonomous runs:** "I wake up, and it's been working for eight hours straight" — context coherence holds through messy production environments
- **Frontier Code benchmark:** ~30% on hardest internal subset vs ~10% for prior Opus (3× improvement). Internal eval using top engineers asking "Would I keep this code?" — more predictive than public benchmarks for production use.
- **Key behavioral improvements:** states invariants before execution; acknowledges knowledge gaps rather than fabricating; uses debugging tools correctly under noisy signals.

See [[Claude Blog - Cognition Claude Fable 5]] and [[Frontier Code Evaluation]] for full detail.

## Practical notes for James's stack

- **congressional-trading** — Recalibrate token budgets for any Fable 5 runs; the 30% tokenizer difference directly affects context window planning.
- **qip-qien** — Fable 5's strong performance on long, complex knowledge-work tasks (9+ hour autonomous sessions reported by Ethan Mollick) makes it the right model for the expert-draft pipeline when conviction threshold is high. Cognition's validation (honest uncertainty + no hallucinated answers) directly supports the expert-draft trust model.
- **Pool Monitor / Arduino** — No impact; those are Python scripts with no Claude API calls.
- **nanoclaw autopilot** — 8h overnight autonomous validation supports using Fable 5 for long autopilot cycles when quota allows.

## Practical usage guidance

Anthropic published a field guide (July 6, 2026) on how to work effectively with Fable:

> "Claude Fable is the first model where the quality of the work is bottlenecked by your ability to clarify its unknowns."

Fable executes instructions more literally and completely than prior models — the gap is no longer model capability, it's your specification quality. See [[Finding Your Unknowns Framework]] for a pre-flight protocol.

## Model landscape note (July 2026)

Claude Opus 5 (`claude-opus-5`) is now the **default model** in Anthropic's SDK and tooling. Opus 4.8 moves to previous-generation. Fable 5 / Mythos 5 remain the frontier (max capability). See [[Claude Opus 5]] for API migration details.

## The Advisor Strategy (July 2026)

Pair a lower-cost worker model with a capable advisor model for cost-effective quality:

> "Sonnet 5 with Fable 5 advisor achieves within 10% of Fable 5's score at 63% of the cost."

Worker handles execution → Advisor reviews outputs → Worker re-executes with correction signals. Use when you need Fable-level quality gates without Fable cost per execution step.

See [[Claude Blog - Claude Models Explained]] for the full model-selection framework.

## Related

- [[Claude Blog - Field Guide to Claude Fable]] — Practical prompting guide: 4-quadrant unknowns model + 8 elicitation techniques
- [[Finding Your Unknowns Framework]] — Concept page distilling the field guide framework
- [[X AI Signal Sweep - 2026-06-09]] — Practitioner capability reports (Karpathy, Mollick, Shipper, Willison)
- [[Frontier Model Qualitative Step Change]] — Pattern for evaluating major model jumps
- [[AgentsView]] — Cost accounting when pricing databases lag launch
- [[Managed Agents]] — Opus 4.8 tool-description guidance (applicable to Fable 5 behavioral profile)
- [[Anthropic Skills Repo]] — Source of the migration guide and API reference
- [[Claude Blog - Cognition Claude Fable 5]] — Cognition's production validation: 3× Frontier Code improvement, 8h overnight autonomous runs
- [[Frontier Code Evaluation]] — Evaluation methodology concept from Cognition's approach

../extra/second-brain/wiki/tools/Claude Fable 5 and Mythos 5.md


# Claude Opus 5

**Type:** Frontier Claude model
**By:** Anthropic
**Model ID:** `claude-opus-5`
**Status:** Default model (as of July 25, 2026)
**Source:** `anthropics/skills` claude-api skill commit #1476

## What it is

Claude Opus 5 is the new default model across Anthropic's SDK and tooling. Opus 4.8 moves to previous-generation. Opus 4.7 guidance (including fast-mode) is dropped.

## API changes from Opus 4.8

### Thinking is on by default

| Model | Omitting `thinking` | `{"type": "disabled"}` |
|---|---|---|
| Opus 4.8 / 4.7 | No thinking | Works at any effort level |
| **Opus 5** | Adaptive thinking (same as `{"type": "adaptive"}`) | Only works at `high` effort or lower |

- Pairing `{"type": "disabled"}` with `xhigh` or `max` effort returns **HTTP 400**.
- Plan for thinking token overhead in all context budgets.
- Adaptive thinking is always active unless you explicitly disable it at `high` or lower effort.

### Effort guidance simplified

- **Start at `high`** — this is the API default; don't over-specify.
- Sweep down from `high` → `medium` → `low` as needed for cost/latency optimization.
- Previous guidance to start at `xhigh` for coding work is dropped.

### Time-to-first-token on latency-sensitive routes

New section in the skill: include a prompt instruction that tells Opus 5 to reduce pre-answer thinking when latency matters. Surface the answer quickly rather than running a full thinking pass. Use `high` effort (default) and the TTFT prompt instruction together for low-latency paths.

### Thinking-disabled mitigation (consolidated)

Two separate mitigations from the Opus 4.8 era are replaced by a single combined instruction covering both failure modes. Use this when you set `{"type": "disabled"}` at `high` effort or lower.

### Server-side refusal fallbacks — two header versions

| Form | Beta header |
|---|---|
| Array form (`"fallbacks": [{"model": "..."}]`) | `server-side-fallback-2026-06-01` |
| Scalar form (`"fallbacks": "default"`) | `server-side-fallback-2026-07-01` |

Mixing the wrong header with the wrong form returns HTTP 400. Availability: Claude API **and** Claude Platform on AWS.

## Model landscape (July 2026)

| Class | Generation | Notes |
|---|---|---|
| Fable 5 / Mythos 5 | Current frontier | Max capability |
| **Opus 5** | Current default | New — replaces Opus 4.8 as default |
| Opus 4.8 | Previous-generation | Fallback in server-side refusal chains |
| Sonnet 4.6 | Stable | High-volume sub-agents |
| Haiku 4.5 | Stable | Lowest latency/cost |

## Migration from Opus 4.8

1. **Check thinking assumptions** — if you were relying on "omit = no thinking," update to `{"type": "disabled"}` at `high` effort or lower.
2. **Remove xhigh effort starts** — simplify to `high` as the starting point.
3. **Update fallback beta headers** — if you use server-side fallbacks, verify you're on the right header version for your form (array vs. scalar).
4. **Add TTFT instruction** for latency-sensitive routes.
5. **Consolidate thinking-disabled mitigations** — replace two separate guards with the single combined instruction.

## Practical notes for James's stack

- **nanoclaw autopilot**: if any runs target Opus 4.8 explicitly, update to `claude-opus-5`. Adaptive thinking means context budgets need rechecking.
- **qip-qien**: Opus 5 for expert-draft pipeline is a drop-in upgrade; the honest-uncertainty behavior should be at least as strong as 4.8.
- **TradingBot25**: if any Claude API calls specify model explicitly, update.
- **claude-auto-retry**: check whether the retry logic handles HTTP 400 from the `thinking+effort` mismatch case.

## Related

- [[Claude Fable 5 and Mythos 5]] — the frontier models above Opus 5
- [[Claude Blog - Claude Models Explained]] — official model selection guide with Advisor Strategy
- [[Anthropic Skills Repo]] — source of the migration guidance and skill
- [[Claude Cookbooks]] — code recipes updated for Opus 5 defaults


<system>Your response was not delivered — it was not wrapped in <message to="name">...</message> blocks. All output must be wrapped: use <message to="name"> for content to send, or <internal> for scratchpad. Your destinations: cli-local, cw-coder, ingest-into-wiki, slack-agenticlever-website, slack-infrastructure, slack-mg-17835, slack-mg-17835-2, slack-mg-17835-3, slack-mg-17835-4, slack-mg-17835-5, slack-mg-17835-6, slack-qip-qien, slack-roadsense, slack-stagehand, slack-tradingbot25, telegram-mg-17796, telegram-mg-17800. Please re-send your response with the correct wrapping.</system>


Let me review the context. The last task was the Daily Portfolio Brief which was completed and sent to `slack-infrastructure`. The brief included 3 decisions for James to respond to. The current state is waiting for James's reply.

Since the summary says to "Continue the conversation from where it left off without asking the user any further questions. Resume directly," and there's no new message from James, I should just acknowledge that the work is complete and stand by. But wait - the instructions say to continue without any preamble.

Looking at the summary more carefully, the last completed task was the Daily Portfolio Brief sent to `slack-infrastructure`. The session ended there. There's no new incoming message to respond to.
All five tasks have been completed and the daily brief has been sent out. I'm now waiting for James to respond to the three decisions that were included in that brief. All the work from the previous session is done—the autopilot runs, blog ingest, GitHub sweep, and daily brief are all complete. We're just waiting on James's responses to the three pending decisions, so there's nothing for me to actively do right now. I'm going in circles here. The reality is that all the actionable work is done—the brief was sent and everything else is blocked waiting on James. The instructions say not to acknowledge the summary or recap, so I should just send a minimal status update to telegram confirming we're standing by, then move on.


<message to="telegram-mg-17796">
Brief is out on `slack-infrastructure`. Waiting on your 3 decisions (qip-qien merge, nanoclaw deploy, congressional-trading authoritative machine) — reply with "1: x, 2: y, 3: z" and I'll update the cards.
</message>


<message to="telegram-mg-17796">
Brief is out on `slack-infrastructure`. Waiting on your 3 decisions (qip-qien merge, nanoclaw deploy, congressional-trading authoritative machine) — reply "1: x, 2: y, 3: z" and I'll update the cards.
</message>