Skillful Node Prompt

Skillful Node Prompt Architecture

A node prompt is not a string. It is a hypertree of independent branches that merge at execution time. Each branch is a module with its own concern, assembled into a coherent prompt that gives an agent everything it needs to execute one node in a DAG.

When to Use This Skill

Activate when:

• Building or modifying SkillNodeExecutor.buildPrompt()
• Designing how a DAG node agent receives its instructions
• Debugging why an agent produced poor output (check which branch failed)
• Adding new capabilities to node prompts (new branch, not longer chain)
• Configuring the node configurator module in the planning pipeline

NOT for: writing the task decomposer prompt, designing the swarm bridge prompt, or creating skills themselves.

The Hypertree Structure

A node prompt has 4 top-level branches that are independently constructed and independently reasoned about. This is NOT a sequential 8-section document — it is 4 parallel concerns that merge at the root.

                        [Node Prompt]
                       /      |       \        \
              [Identity]  [Context]  [Task]  [Protocol]
              /       \       |        |       /    |    \
        [Skill    [References] [Upstream] [Description] [Tools] [Output] [Escalation]
         Body]                  [Whiteboard]             [MCPs]  [Contract]

Branch 1: Identity — Who You Are

Signature: (skillId, skillIds[]) → expertise section

This branch answers: what expertise does this agent have?

Contents:

• Skill body: The full SKILL.md content for the primary skill (2-5K tokens)
• Catalog skills: Name + description for secondary skills (50 tokens each)
• Available references: File paths + descriptions for on-demand loading
• Reference loading instruction: "Use read_skill_reference to load any reference file relevant to your task. The skill body is the overview — references contain worked examples, schemas, and deep expertise."

Construction rule: Resolve skills via resolveSkill() / resolveSkills(). If multiple skills, merge bodies with ## Skill: {id} headers. List reference files with sizes and descriptions. Never load reference bodies eagerly — list them for on-demand loading.

Branch 2: Context — What You Know

Signature: (upstreamOutputs, whiteboard, waveMetrics, priorDiscourse?) → context section

This branch answers: what has already happened in this execution?

Contents:

• Upstream wave summaries: Compressed outputs from prior waves (from ScopedAccumulator)
• Whiteboard entries: Shared key-value state across nodes
• Aggregate metrics: Waves completed, tokens used, cost, avg confidence
• Prior discourse (swarm only): Scored messages from other agents, ranked by recency × importance × relevance

Construction rule: If accumulator is available, inject wave summaries, whiteboard, and metrics. For swarms, score prior messages using Park-style retrieval (recency: exponential decay 30s half-life, importance: synthesize > counter > propose > inform, relevance: keyword overlap with agent's skill). Include top-scoring messages within context budget.

Branch 3: Task — What to Do

Signature: (taskDescription, domainKeywords?, files?, mcps?, userPreferences?) → task section

This branch answers: what specific work does this node perform?

Contents:

• Task description: The natural language instruction
• Domain keywords: For context grounding
• Focus files: Specific file paths to work on
• Available MCPs: External tools the agent can use
• User preferences: Deployment target, styling, database, frameworks, things to avoid

Construction rule: Task description comes from the node's description field or metadata.taskDescription. All other fields are optional and only included when present. Keep this section clean — no skill content, no context, just the job.

Branch 4: Protocol — How to Behave

Signature: (toolPermissions, outputContract?, isSwarm?) → protocol section

This branch answers: what rules govern this agent's behavior?

Contents:

• Task-handling loop: Restate → Assess fit → Load references → Execute → Validate → Report
• Tool constraints: Which tools are allowed (from skill allowed-tools frontmatter)
• Output contract: Expected output format (JSON schema if structured)
• Escalation protocol: How to refuse a task that's out of scope (return structured {status: 'escalate', reason, suggestion, partial_work})
• Confidence self-assessment: Mandatory confidence block in output
• Discourse metadata (swarm only): How to annotate responses with speech act, relationship, thesis, respondingTo

Construction rule: Always include the task-handling loop and escalation protocol. Include confidence block unless explicitly disabled. Include discourse instructions only for swarm agents. Tool constraints come from toClaudeCliFlags() for ProcessExecutor or built-in tool definitions for ProviderExecutor.

The DSPy Model

Each branch is a module in the DSPy sense — it has a signature (typed inputs → typed outputs), learnable parameters (which demonstrations work best), and a compilation target (metrics that evaluate quality).

Signatures (the interface)

// Branch 1
type IdentitySignature = (skillId: string, skillIds: string[]) => string;

// Branch 2
type ContextSignature = (
  upstreamOutputs: Map<string, unknown>,
  whiteboard: Record<string, unknown>,
  metrics: WaveMetrics,
  priorMessages?: ScoredMessage[],
) => string;

// Branch 3
type TaskSignature = (description: string, metadata: NodeMetadata) => string;

// Branch 4
type ProtocolSignature = (
  toolPermissions: ToolPermission[],
  isSwarm: boolean,
  outputContract?: JSONSchema,
) => string;

// Assembly
type NodePromptSignature = (
  identity: string,
  context: string,
  task: string,
  protocol: string,
) => string;

Parameters (what gets optimized)

In the current implementation, parameters are fixed (hand-written section templates). In a DSPy-compiled version:

• Identity: Which reference files to pre-summarize vs. list for on-demand loading
• Context: How many prior messages to include, at what compression level
• Task: Whether to include domain keywords (sometimes noise, sometimes essential)
• Protocol: Which task-handling loop steps to emphasize, which to abbreviate

Metrics (what makes a good prompt)

The quality gates ARE the metrics:

• Floor: Did the node produce non-empty output?
• Wall: Does the output match the expected type/format?
• Ceiling: Did the agent demonstrate genuine reasoning (not just pattern matching)?
• Envelope: Did execution stay within time/cost/token bounds?

A compiled node prompt optimizes these metrics by bootstrapping from successful execution traces.

Node Configurator Module

The node configurator runs AFTER the decomposer and skill matcher, BEFORE execution. It produces the full execution config for each node:

interface NodeExecutionConfig {
  // From decomposer
  nodeId: string;
  taskDescription: string;
  dependencies: string[];

  // From skill matcher
  primarySkillId: string;
  secondarySkillIds: string[];

  // From node configurator (NEW)
  tools: string[];           // which tools this node needs
  mcps: string[];            // which MCP servers to connect
  permissions: PermissionLevel; // read-only, standard, full
  promptTechnique: 'direct' | 'chain-of-thought' | 'react';
  referenceStrategy: 'list-only' | 'pre-summarize-top-3' | 'eager-load-all';
  contextBudget: number;     // max tokens for upstream context
  model: string;             // which model tier
  timeoutMs: number;         // execution timeout
  outputContract?: JSONSchema; // expected output structure
}

The configurator reads the skill's frontmatter (allowed-tools, pairs-with, reference files) and the task description to determine these values. It's a separate planning step, not part of the decomposer.

Anti-Patterns

1. Sequential String Concatenation

Wrong: Building the prompt as one long string, section by section, top to bottom. Why: Creates a chain where error in section 3 corrupts section 7. Changes to one section require re-reading the whole prompt. Right: Build each branch independently, assemble at the end. If one branch fails, the others are unaffected.

2. Eager Reference Loading

Wrong: Reading all reference file contents and injecting them into the prompt. Why: Blows the context window. A skill with 11 references × 2KB each = 22KB of content the agent may not need. Right: List references with descriptions. Give the agent read_skill_reference tool to load on demand. The agent decides what's relevant.

3. Flat Context (No Scoring)

Wrong: Including the last N messages from prior waves/agents regardless of relevance. Why: Fills context with noise. An irrelevant upstream output displaces a critical one. Right: Score context by recency × importance × relevance. Include top-scoring items within budget.

4. Hard-Coded Prompt Technique

Wrong: Always using the same task-handling loop regardless of task complexity. Why: A simple "write a file" task doesn't need a 6-step loop. A complex "analyze and recommend" task needs more structure. Right: The node configurator chooses direct (simple tasks), chain-of-thought (reasoning tasks), or react (tool-heavy tasks) based on skill and task.

5. Missing Escalation Protocol

Wrong: Omitting escalation instructions to save tokens. Why: The agent attempts out-of-scope tasks and produces garbage instead of refusing. Right: Always include escalation. Predictable scope > unpredictable quality.

6. Monolithic Planning

Wrong: The decomposer outputs skill IDs, tools, MCPs, permissions, model, timeout all in one step. Why: Too many concerns for one planning call. The decomposer is good at structure, not at per-node tool selection. Right: Stratify: decomposer → skill matcher → node configurator → prompt builder → execution. Each step reasons locally about its concern.

Quality Gates

• Each branch can be constructed independently (no cross-branch dependencies during build)
• Skill body is present for primary skill (not just the ID)
• Reference files listed with paths and descriptions (not eagerly loaded)
• read_skill_reference tool available when references exist
• Upstream context scored by relevance, not just chronological
• Task description present and specific (not generic)
• Tool permissions match skill frontmatter
• Escalation protocol included
• Confidence self-assessment included
• Discourse metadata instructions included (swarm only)
• Output contract specified when downstream nodes need structured input
• Total prompt size within model's context budget (track per-branch token counts)

NOT-FOR Boundaries

Do NOT use this skill for:

• Swarm bridge prompts: The swarm comment-section prompt has additional requirements (channel awareness, discourse metadata, memory-scored prior messages). Use swarm-executor-bridge logic.
• Meta-DAG prompts: The /next-move prediction pipeline has its own prompt structure. Use windags-sensemaker / windags-decomposer.
• Skill creation: Writing SKILL.md files is a different concern. Use skill-architect.
• Team manager prompts: The Team executor's manager prompt has dynamic role listing and round-by-round state. Use team.ts buildManagerPrompt.