{
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  "Kind": "DirectoryIssues",
  "Slug": "rubber-duck",
  "Name": "rubber-duck",
  "CanonicalUrl": "https://askpod.ai/mcp/rubber-duck/issues",
  "ServerUrl": "https://askpod.ai/mcp/rubber-duck",
  "IssueTotal": 52,
  "Held": 23,
  "Issues": [
    {
      "Title": "duck_debate 'Failed to retrieve task' error + suggestions for filesystem access and fire-and-forget wrapper",
      "Excerpt": "# Bug: duck_debate intermittently fails with \"Failed to retrieve task: Task not found\"\n\n## Description\n\n`duck_debate` intermittently fails with `MCP error -32602: Failed to retrieve task: Task not found`. This occurs randomly — not related to prompt size or provider selection. When it fails, ALL subsequent tool calls (compare_ducks, ask_duck, etc.) also fail for ~50s (the MCP client's 3-retry cycle).\n\n## Root Cause (traced through source)\n\n`duck_debate` is the only tool using `registerToolTask()",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/127",
      "PublishedAt": "2026-07-19T03:13:31.000Z",
      "State": "closed",
      "Comments": 4,
      "Reporter": "External",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "🚀 Migrate to Bun Runtime",
      "Excerpt": "# 🚀 Migrate to Bun Runtime\n\n## Summary\n\nMigrate MCP Rubber Duck from Node.js/npm to Bun as the primary runtime for faster builds, tests, and development experience.\n\n**Approach:** Hybrid migration - Bun for runtime/build/test, Node.js for npm publish (due to [missing provenance support](https://github.com/oven-sh/bun/issues/15601) and [auth bugs in CI](https://github.com/oven-sh/bun/issues/24124)).\n\n## Motivation\n\n- **Speed**: Bun installs packages 20-40x faster than npm\n- **Native TypeScript**:",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/41",
      "PublishedAt": "2026-01-24T17:34:39.000Z",
      "State": "open",
      "Comments": 3,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Duck Autopilot - Automatic task decomposition & workflows",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n```\n     __\n   <(o )___\n    ( ._> /   \"Quack! Just tell me your goal, I'll handle the rest!\"\n     `---'\n```\n\n### 💡 The Problem\n**What problem would this feature solve?**\n\nComplex tasks currently require manual orchestration:\n- Users must decompose tasks into steps themselves\n- Manual selection of which duck/tool to use for each step\n- No automatic error recovery or replanning\n- Can't leverage the full power of multi-duck + MCP tools together\n\n### 🚀 Proposed Soluti",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/12",
      "PublishedAt": "2026-01-08T10:00:26.000Z",
      "State": "open",
      "Comments": 3,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Streamable HTTP transport support",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n### 💡 The Problem\nThe server currently only supports stdio transport, limiting deployment to local processes launched by MCP clients. This prevents:\n- Remote/cloud deployment\n- Horizontal scaling\n- Web-based access\n- Future Server Cards support (requires HTTP)\n\n### 🚀 Proposed Solution\nAdd Streamable HTTP transport alongside existing stdio transport.\n\n**Benefits:**\n- Deploy as a standalone HTTP service\n- Support multiple concurrent clients\n- Enable cloud/container ",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/57",
      "PublishedAt": "2026-02-05T14:00:46.000Z",
      "State": "open",
      "Comments": 2,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Add human-readable title to all tools",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n### 💡 The Problem\nTools only have `name` and `description` fields. The MCP spec now supports a `title` field for human-readable display names, which improves UI presentation in clients.\n\n### 🚀 Proposed Solution\nAdd `title` field to all tool definitions for better UX in MCP clients.\n\n**Example:**\n```typescript\nthis.server.tool('duck_council', {\n  title: 'Duck Council',\n  description: 'Convene multiple ducks to discuss a topic and reach consensus',\n  // ...\n})\n```\n\n",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/54",
      "PublishedAt": "2026-02-05T14:00:26.000Z",
      "State": "closed",
      "Comments": 2,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Add outputSchema to voting/consensus tools",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n### 💡 The Problem\nTool results from voting and consensus tools (`duck_vote`, `duck_council`, `duck_judge`, etc.) return structured JSON data, but clients have no way to validate or understand the expected output format without inspecting the response.\n\n### 🚀 Proposed Solution\nAdd `outputSchema` definitions to tools that return structured data. This is supported in the MCP spec (2025-11-25) and helps:\n- Clients validate responses\n- LLMs better understand returned d",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/53",
      "PublishedAt": "2026-02-05T14:00:21.000Z",
      "State": "closed",
      "Comments": 2,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: MCP Prompts - Expose discoverable prompt templates",
      "Excerpt": "## Summary\nImplement MCP Prompts capability to expose reusable, discoverable prompt templates that clients like Claude Desktop can list, autocomplete, and invoke.\n\n## Background\n\n### What Are MCP Prompts?\nPrompts are **reusable, discoverable prompt templates** that MCP servers expose to clients. Think of them as \"slash commands\" that clients can list, autocomplete, and invoke.\n\n**Key difference from Tools:**\n- **Tools** = Actions the LLM executes (functions)\n- **Prompts** = Pre-built conversatio",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/23",
      "PublishedAt": "2026-01-13T13:39:02.000Z",
      "State": "closed",
      "Comments": 2,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Duck Observability & Tracing",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n```\n     __\n   <(o )___\n    ( ._> /   \"Quack! I see everything that happens in the pond!\"\n     `---'\n```\n\n### 💡 The Problem\n**What problem would this feature solve?**\n\nCurrently, there's limited visibility into:\n- Token usage and costs per request/provider\n- Latency breakdown across providers\n- Cache hit/miss rates\n- Historical usage patterns\n- Debugging failed or slow requests\n\n### 🚀 Proposed Solution\n**What would you like to happen?**\n\nAdd comprehensive observab",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/11",
      "PublishedAt": "2026-01-08T10:00:09.000Z",
      "State": "closed",
      "Comments": 2,
      "Reporter": "Maintainer",
      "Rank": "top",
      "Extractor": "github_issue"
    },
    {
      "Title": "duck_council: add a synthesis-only output mode (return the final report, not every duck's response)",
      "Excerpt": "Motivated by the \"fire-and-forget wrapper\" suggestion in #127.\n\n`duck_council` currently returns **every duck's full verbose response**. When an agent offloads a whole council workflow, all of that lands in the caller's context.\n\n### Ask\nAdd a **synthesis-only** output mode (or a verbosity flag) to `duck_council` — return just the final synthesized report instead of each duck's full answer. Optionally a `mode: full | synthesis` param, defaulting to current behavior for back-compat.\n\n### Why this",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/131",
      "PublishedAt": "2026-07-21T11:57:24.000Z",
      "State": "open",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "Docs: read-only filesystem MCP Bridge recipe (+ trusted-tools-gates-calls-not-tools caveat)",
      "Excerpt": "Requested in #127: give ducks read-only file access (source, configs, PDFs) during code review without manual copy-paste.\n\nThis already works today via the MCP Bridge — no code change needed. Any third-party filesystem MCP server plugs in through the existing env vars:\n\n```yaml\nMCP_SERVER_FS_TYPE: stdio\nMCP_SERVER_FS_COMMAND: npx\nMCP_SERVER_FS_ARGS: -y,@modelcontextprotocol/server-filesystem,/path/to/allowed/dir\nMCP_SERVER_FS_ENABLED: 'true'\nMCP_TRUSTED_TOOLS_FS: '*'\n```\n\n### Ask\nAdd a documente",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/130",
      "PublishedAt": "2026-07-21T11:57:22.000Z",
      "State": "closed",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "MCP Bridge: global MCP_TRUSTED_TOOLS='*' ignored + server-name derivation can force approval prompts",
      "Excerpt": "Surfaced while investigating #127 (fixed in v1.20.1). The `MCP_APPROVAL_MODE=trusted` + `MCP_TRUSTED_TOOLS_*='*'` bypass works for the common **per-server** case, but two real edge cases can still force an approval prompt. `MCP_APPROVAL_MODE=never` is a working workaround meanwhile.\n\n### 1. Global `MCP_TRUSTED_TOOLS='*'` is silently ignored\n\n- `src/config/config.ts` parses `MCP_TRUSTED_TOOLS='*'` into a literal `Set(['*'])`.\n- But the global fallback branch in `src/services/function-bridge.ts` c",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/129",
      "PublishedAt": "2026-07-21T11:57:21.000Z",
      "State": "open",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: duck_check — cross-vendor GO/BLOCK/ASK-HUMAN action gate for agents",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n```\n     __\n   <(o )___\n    ( ._> /   \"Quack! Before you run that migration... let me get a second opinion.\"\n     `---'\n```\n\n### 💡 The Problem\n**What problem would this feature solve?**\n\nWhen a coding agent (Claude Code / Cursor / Codex) is about to take a **risky action** — apply a diff, run a DB migration, execute a shell command, delete files — there is no cheap, cross-vendor \"second opinion gate\" it can consult *before* executing.\n\nA single-model self-check is",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/120",
      "PublishedAt": "2026-06-09T08:22:35.000Z",
      "State": "open",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: duck_judge Panel — debiased multi-provider judging (position-bias swap, judge panel, agreement confidence, outputSchema)",
      "Excerpt": "## 🦆 Duck Enhancement Proposal\n\n```\n     __\n   <(o )___\n    ( ._> /   \"I'll judge fairly... unless you put yourself first in the list.\"\n     `---'\n```\n\n### 💡 The Problem\n\n`duck_judge` exists to settle which duck gave the best answer — but today it does so with a **single, position-biased, schema-less** judge. That's exactly the part of the pipeline most vulnerable to silent, systematic error:\n\n1. **One judge, no bias cancellation.** The judge defaults to the *first available provider* (`src/tool",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/119",
      "PublishedAt": "2026-06-09T08:22:26.000Z",
      "State": "open",
      "Comments": 0,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Server Card (/.well-known/mcp/server-card.json)",
      "Excerpt": "## Summary\n\nImplement Server Card support per draft spec SEP-1649 for auto-discovery by clients and crawlers without establishing a connection.\n\nSplit from #100 (Registry publish is done).\n\n## References\n\n- #49\n- [SEP-1649: Server Cards](https://github.com/modelcontextprotocol/modelcontextprotocol/issues/1649)",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/101",
      "PublishedAt": "2026-04-03T12:11:27.000Z",
      "State": "open",
      "Comments": 0,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: MCP Registry publish + Server Card",
      "Excerpt": "## Summary\n\nRemaining items from #97 — Registry listing and Server Card support.\n\n## Items\n\n- [ ] **Publish to MCP Registry** — namespace `io.github.nesquikm/rubber-duck` is ready. Use `mcp-publisher` CLI to list in the [official registry](https://registry.modelcontextprotocol.io/).\n- [ ] **Server Card** (`/.well-known/mcp/server-card.json`) — #49. Draft spec (SEP-1649) for auto-discovery by clients and crawlers without establishing a connection.\n\n## References\n\n- [MCP Registry](https://registry",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/100",
      "PublishedAt": "2026-04-03T12:02:26.000Z",
      "State": "closed",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Server Card (.well-known/mcp/server-card.json) for pre-connection discovery",
      "Excerpt": "## Summary\n\nImplement [MCP Server Cards](https://github.com/modelcontextprotocol/modelcontextprotocol/issues/1649) (SEP-1649) — expose a `.well-known/mcp/server-card.json` endpoint for pre-connection discovery.\n\nSplit from #97 (item 4).\n\n## Blocked by\n\n- #57 — Requires HTTP transport support (currently stdio only)\n\n## Server card contents\n\n- Server name, version, description\n- Available tools with descriptions\n- Supported capabilities (MCP Bridge, etc.)\n- Authentication requirements (if any)\n- P",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/98",
      "PublishedAt": "2026-04-03T11:34:40.000Z",
      "State": "open",
      "Comments": 0,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: MCP spec quick wins — SDK upgrade, outputSchema, Registry, Server Card",
      "Excerpt": "## Summary\n\nBundle of low-effort, high-value improvements to align with the latest MCP ecosystem (Nov 2025 spec, Registry GA).\n\n## Items\n\n- [ ] **Upgrade MCP TypeScript SDK to ^1.27.x** — currently on ^1.24.0. Unlocks Tasks improvements, structured tool outputs, latest auth primitives, and extensions framework support.\n- [ ] **outputSchema for voting/consensus tools** — #53\n- [ ] **Publish to MCP Registry** — namespace `io.github.nesquikm/rubber-duck` is ready. Use `mcp-publisher` CLI to list in",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/97",
      "PublishedAt": "2026-04-03T11:08:29.000Z",
      "State": "closed",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: support image URLs in multimodal input",
      "Excerpt": "## Summary\n\nCurrently, image input for tools like `ask_duck`, `compare_ducks`, `duck_council`, and `chat_with_duck` only accepts base64-encoded data (`ImageInput.data` + `ImageInput.mimeType`). This requires callers to handle encoding themselves, which is awkward — especially from CLI tools like Claude Code where inline images can't easily be converted to base64.\n\n## Proposal\n\nAdd `url` support to `ImageInput`, so callers can pass an image URL instead of base64:\n\n```typescript\nexport interface I",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/87",
      "PublishedAt": "2026-03-17T06:16:44.000Z",
      "State": "closed",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: multimodal audio support (input + MCP Bridge)",
      "Excerpt": "## Summary\n\nAdd audio support across the full pipeline — both user-initiated audio input to ducks and audio content flowing back from MCP Bridge tool results.\n\n## Context\n\nThe MCP protocol supports `AudioContent` (`{ type: \"audio\", data: base64, mimeType }`) as a first-class content type. Major providers now support audio input:\n\n- **OpenAI**: GPT-4o-audio-preview and newer models accept audio via a separate `audio` parameter (not inline content parts like vision)\n- **Gemini**: Supports inline a",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/79",
      "PublishedAt": "2026-03-06T15:53:58.000Z",
      "State": "open",
      "Comments": 0,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: multimodal MCP Bridge — pass image tool results to LLM conversations",
      "Excerpt": "## Summary\n\nWhen ducks use MCP Bridge to call external MCP server tools, those tools can return `ImageContent` (`{ type: \"image\", data: base64, mimeType }`) in their results. Currently, `EnhancedDuckProvider.handleToolCalls()` (line 268) stringifies ALL tool results to JSON text via `JSON.stringify(result.data)`, so vision-capable models never actually \"see\" the images.\n\n## Real-world MCP servers that return ImageContent\n\nThis is not theoretical — many popular MCP servers return `type: \"image\"` ",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/78",
      "PublishedAt": "2026-03-06T15:30:54.000Z",
      "State": "open",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Multimodal support - Vision input and image/audio responses",
      "Excerpt": "## Summary\n\nAdd multimodal capabilities to ducks — allow sending images/audio to providers (vision input) and returning image/audio content in tool responses.\n\n## Motivation\n\nMCP already supports multimodal content types (`ImageContent`, `AudioContent` since protocol 2025-06-18), and most OpenAI-compatible providers support vision input. This is a natural extension that would enable ducks to analyze screenshots, diagrams, UI mockups, and other visual content.\n\n## MCP Spec Support\n\nThe MCP protoc",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/76",
      "PublishedAt": "2026-03-06T14:41:37.000Z",
      "State": "closed",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "Add multi-round tool calling loop for MCP Bridge ducks",
      "Excerpt": "## Problem\n\n`EnhancedDuckProvider.handleToolCalls()` only executes **one round** of tool calls. After executing tools and feeding results back to the LLM, it strips the `tools` parameter from the follow-up call:\n\n```typescript\n// duck-provider-enhanced.ts lines 277-283\ndelete followUpParams.tools;\ndelete followUpParams.tool_choice;\n```\n\nThis means ducks can never chain tool calls — they get one shot, then must respond with text.\n\n## Why it matters\n\nUseful debugging workflows require multi-step t",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/69",
      "PublishedAt": "2026-02-26T08:43:21.000Z",
      "State": "closed",
      "Comments": 1,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    },
    {
      "Title": "feat: Elicitation - Human-in-the-loop for interactive duck tools",
      "Excerpt": "## Summary\n\nMCP [Elicitation](https://modelcontextprotocol.io/specification/2025-06-18/client/elicitation) (spec June 2025) allows servers to ask users structured questions mid-execution. This enables interactive, iterative workflows where ducks can pause and request user input before continuing.\n\n## Client Support\n\n| Client | Support |\n|--------|---------|\n| Cursor (1.5+) | ✅ |\n| VS Code / GitHub Copilot | ✅ |\n| Claude Desktop | ❌ |\n| Claude Code | ❌ |\n| Zed | ❌ |\n\n## Use Cases\n\n- **Duck Hypoth",
      "SourceUrl": "https://github.com/nesquikm/mcp-rubber-duck/issues/60",
      "PublishedAt": "2026-02-08T09:04:57.000Z",
      "State": "open",
      "Comments": 0,
      "Reporter": "Maintainer",
      "Rank": "recent",
      "Extractor": "github_issue"
    }
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