Techpacks Gateway

Single entry point for all core↔tech-pack interactions. No other core file reads techpack.yaml directly, resolves tech pack paths, or loads tech pack skills on its own.

Operations

Eight typed operations — see resources/operations.md for detailed implementations.

Operation	Purpose	Returns
readManifest(namespace)	Parse and return validated techpack.yaml	Typed manifest object
resolvePath(namespace, path)	Resolve a relative path from manifest to absolute path	Absolute file path
loadSkill(namespace, skillPath)	Load a tech pack skill into context	Skill content
loadAgent(namespace, agentRef)	Read agent file, parse frontmatter, resolve skills, spawn as Task subagent	Task subagent with composed prompt
routeCommand(namespace, command, args)	Invoke the command router skill with structured context	Command result
routeSkills(namespace, phase, componentType?, agent?)	Invoke the skills router to get relevant skills for a phase	Skills loaded into context
listComponents(namespace)	Read component types from manifest	Component type list with metadata
dependencyOrder(namespace)	Build topological order from dependency graph	Ordered component type list

Invocation Pattern

Core skills invoke techpacks operations using this pattern:

Invoke techpacks.readManifest for the active tech pack namespace.
Read the `components` section to find the agent assigned to a given component type.

Invoke techpacks.routeSkills with:
  namespace: <active-namespace>
  phase: plan-generation
  component_type: <type>

Invoke techpacks.loadAgent with:
  namespace: <active-namespace>
  agentRef: { name: "my-agent", path: "agents/my-agent.md" }
  skills: ["coding-standards", "testing-standards"]

Active Tech Packs

Read sdd/sdd-settings.yaml (or .sdd/sdd-settings.yaml) to find active tech packs:

techpacks:
  <namespace>:
    name: <tech-pack-name>
    namespace: <namespace>
    version: "1.0.0"
    mode: internal           # or external, git
    path: <tech-pack-directory>

For internal tech packs, resolve path relative to the plugin root directory. For git-mode tech packs, resolve install_path relative to the project root.

# Git-mode example:
techpacks:
  my-pack:
    name: my-pack
    namespace: my-pack
    version: "1.0.0"
    mode: git
    repo: https://github.com/org/my-pack.git
    ref: v1.0.0
    install_path: sdd/.techpacks/my-pack/techpack

Enforcement Rules

1. Single gateway. All core→tech-pack interactions flow through this skill. No other core file reads techpack.yaml directly.
2. No direct reads. Core skills and system commands never read tech pack skill files or agent files directly. They always go through techpacks.
3. Prompt isolation. Agent markdown bodies and resolved skill contents NEVER appear in the main conversation context. Use system-run.sh agent frontmatter to extract only structured metadata. Spawn agents as Task subagents with their own context.
4. Structured logging. Every techpacks operation logs via system-run.sh log write --level info --source techpacks.<operation> --message "<description>".
5. Fail loudly. If a manifest is missing, invalid, or a referenced path doesn't exist, return a clear error. Never silently fall back to hardcoded defaults.

System CLI Commands

The techpacks gateway uses these system CLI commands:

Command	Purpose
system-run.sh tech-pack validate --path <dir>	Validate a manifest
system-run.sh tech-pack info --namespace <ns>	Read manifest data
system-run.sh tech-pack list	List installed tech packs
system-run.sh agent frontmatter --path <file>	Extract agent metadata (prompt isolation)
system-run.sh log write --level <l> --source <s> --message <m>	Structured logging