/plugins/ruflo-cost-tracker/docs/adrs/0001-cost-tracker-contract.md

id, title, status, date, updated, authors, tags

id	title	status	date	updated	authors	tags
ADR-0001	ruflo-cost-tracker plugin contract — pinning, namespace-routing fix, federation budget integration, smoke as contract	Accepted	2026-05-04	2026-05-09	reviewer (Claude Code)	plugin cost tokens budget optimization namespace federation smoke-test

Context

ruflo-cost-tracker (v0.2.1) tracks token usage per agent/task/model, computes USD cost attribution, and recommends optimizations. It already documents:

• Two AgentDB namespaces (cost-tracking for usage records, cost-patterns for optimization patterns)
• Federation budget circuit breaker pairing per ADR-097 (host-side federation_send caps: maxHops, maxTokens, maxUsd, hopCount, spent.{tokens,usd})
• 5 cost subcommands (report, breakdown, budget, optimize, history)
• 2 skills + 1 agent + REFERENCE.md (token-optimized per ADR-098 Part 2)

The drift this ADR fixes

The two skills (cost-report, cost-optimize) call agentdb_hierarchical-recall with a namespace: 'cost-tracking' argument and agentdb_pattern-store with namespace: 'cost-patterns'. Per ruflo-agentdb ADR-0001 §"Where namespace strings actually apply", neither tool family routes by namespace:

• agentdb_hierarchical-* routes by tier (working|episodic|semantic). Namespace argument is silently ignored.
• agentdb_pattern-* routes through ReasoningBank. Namespace argument is silently ignored. Fallback writes to the reserved pattern namespace, not to cost-patterns.

The CLI examples in the agent file have always been correct (memory store --namespace cost-tracking). The skills' MCP-tool mapping was wrong. This ADR fixes them.

Decision

1. Skill fixes (real bug, not just docs)

• cost-report/SKILL.md — replace agentdb_hierarchical-recall with memory_search / memory_list / memory_retrieve (namespace-routed). Update allowed-tools accordingly. Cross-link the namespace convention.
• cost-optimize/SKILL.md — replace the load step with memory_search. Document two write paths for optimization patterns:
  • agentdb_pattern-store (ReasoningBank-routed; no namespace arg; fallback lands in reserved pattern namespace)
  • memory_store --namespace cost-patterns (namespace-routable; lands where the agent file's CLI examples promise)

2. Add this ADR (Proposed)

docs/adrs/0001-cost-tracker-contract.md. Cross-links the eight sibling ADRs.

3. README augment

Append:

• Compatibility — pin to @claude-flow/cli v3.6.
• Namespace coordination — owns cost-tracking (memory-routed) + cost-patterns (memory-routed). Reserved namespaces (pattern, claude-memories, default) MUST NOT be shadowed.
• Architecture Decisions + Verification sections.
• The federation budget pairing block already in README stays as-is (already correctly references ADR-097).

4. Plugin metadata

Bump 0.2.1 → 0.2.2. Patch bump justified: skill fixes are functional changes (the skills weren't doing what they claimed), but the public command surface is unchanged. Keywords add namespace-routing, mcp.

5. Smoke contract (scripts/smoke.sh)

10 checks:

1. plugin.json declares 0.2.2 with new keywords.
2. Both skills (cost-report, cost-optimize) present with valid frontmatter.
3. Skills use memory_search / memory_store for cost-tracking and cost-patterns namespaces (not agentdb_hierarchical-* / agentdb_pattern-* with a namespace arg).
4. cost-optimize documents both pattern-store paths (ReasoningBank vs namespace-routable).
5. README pins to @claude-flow/cli v3.6.
6. README references ruflo-agentdb namespace convention.
7. README's federation budget circuit breaker pairing block (ADR-097) is intact.
8. ADR-0001 exists with status Proposed.
9. REFERENCE.md exists and is non-empty (token-optimization pattern).
10. No skill grants wildcard tool access.

Consequences

Positive:

• Skills now actually do what their docs promise. cost-report reads from cost-tracking; cost-optimize writes to cost-patterns (or to ReasoningBank explicitly).
• Future plugins reading the cost-tracker skills as a template won't replicate the namespace-routing bug.

Negative:

• One downstream change visible to anyone scripting against the old (broken) MCP tool calls. Mitigation: the agent file's CLI examples already used the correct pattern.

Neutral:

• No new MCP tools. No new skills. No new subcommands. Functional fix + documentation + smoke.

Verification

bash plugins/ruflo-cost-tracker/scripts/smoke.sh
# Expected: "10 passed, 0 failed"

Related

• plugins/ruflo-agentdb/docs/adrs/0001-agentdb-optimization.md — namespace convention; defines the routing contract this ADR fixes a violation of
• plugins/ruflo-ruvector/docs/adrs/0001-pin-ruvector-0.2.25.md
• plugins/ruflo-browser/docs/adrs/0001-browser-skills-architecture.md
• plugins/ruflo-intelligence/docs/adrs/0001-intelligence-surface-completeness.md
• plugins/ruflo-adr/docs/adrs/0001-adr-plugin-pattern.md
• plugins/ruflo-aidefence/docs/adrs/0001-aidefence-contract.md
• plugins/ruflo-autopilot/docs/adrs/0001-autopilot-contract.md
• plugins/ruflo-core/docs/adrs/0001-core-contract.md
• v3/docs/adr/ADR-097-federation-budget-circuit-breaker.md — federation budget envelope

Implementation status

Plugin version v0.16.1 shipped and listed in marketplace.json. Source exists at plugins/ruflo-cost-tracker/. Contract elements implemented: dual namespaces (cost-tracking, cost-patterns) with correct memory_* routing; ADR-097 budget circuit breaker Phase 1 (send-side enforcement) documented; namespace-routing bug fixed (switched from agentdb_hierarchical-* to memory_*); smoke-as-contract gate defined in scripts/smoke.sh.