Files to check (in pipeline order):
1. gtm-context.md          - Business context (written by gtm-analytics-audit on first run)
2. gtm-credentials.json    - OAuth credentials (gtm-setup)
3. gtm-token.json          - Auth tokens (gtm-setup)
4. gtm-config.json         - Account/container IDs (gtm-setup)
5. audit-report.json       - Codebase scan results (gtm-analytics-audit)
6. gtm-tracking-plan.json  - Tracking specification (gtm-strategy)
7. gtm-implementation-log.json - What was built (gtm-implementation)
8. gtm-test-results.json   - Test pass/fail (gtm-testing)
9. gtm-fix-guide.md        - Fix instructions (gtm-fix-guide)
10. docs/gtm-event-schema.md - Technical docs (gtm-reporting)
11. docs/gtm-executive-summary.md - Stakeholder docs (gtm-reporting)

=== GTM Pipeline Status ===
Project: [containerId from gtm-config.json, or "not configured"]
Last checked: [current timestamp]

--- Setup ---
[✓/✗] Business context    gtm-context.md       [found / not found]
[✓/✗] GTM credentials     gtm-credentials.json [found / not found]
[✓/✗] GTM config          gtm-config.json      [found: acct/container IDs / not found]

--- Planning ---
[✓/✗] Analytics audit     audit-report.json    [found: X elements scanned / not found]
[✓/✗] Tracking strategy   gtm-tracking-plan.json [found: X events, Y P0 / not found]

--- Implementation ---
[✓/✗] Implementation      gtm-implementation-log.json [found: X tags created, last run [date] / not found]

--- Validation ---
[✓/✗] Test results        gtm-test-results.json [found: X passed, Y failed / not found]
[✓/✗] Fix guide           gtm-fix-guide.md      [found / not found]

--- Documentation ---
[✓/✗] Event schema        docs/gtm-event-schema.md [found / not found]
[✓/✗] Executive summary   docs/gtm-executive-summary.md [found / not found]

--- Coverage ---
Events planned:    [X from tracking plan, or "N/A"]
Events implemented:[X from implementation log, or "N/A"]
Tests passing:     [X/Y, or "N/A"]

--- Recommended Next Step ---

[CONDITION → RECOMMENDATION]:

Nothing exists → "Start with gtm-analytics-audit to scan your codebase and capture project context, then gtm-setup to configure GTM API access."

context + setup missing → "Run gtm-setup to connect your GTM account. API credentials are needed before any implementation."

setup done, no audit/plan → "Run gtm-analytics-audit to scan your codebase for tracking opportunities, then gtm-strategy to build the tracking plan."

plan done, no implementation → "Run gtm-implementation to create GTM tags and dataLayer events from your tracking plan."

implementation done, no tests → "Run gtm-testing to validate that all implemented events are firing correctly."

tests done with failures → "X tests failed. Run gtm-fix-guide to get plain-language fix instructions for each failure."

all tests passing, no docs → "Implementation complete. Run gtm-reporting to generate technical docs and stakeholder summary."

docs done → "Pipeline complete. Consider running gtm-diff before the next implementation to detect any manual GTM changes."

--- Flags ---
[Only show if anomalies detected]

⚠ gtm-test-results.json is older than gtm-implementation-log.json
  → Tests may not reflect the latest implementation. Re-run gtm-testing.

⚠ gtm-tracking-plan.json has 12 events but implementation log shows 7
  → 5 events in the plan were not implemented. Run gtm-implementation to complete.

⚠ gtm-token.json exists but is more than 7 days old
  → OAuth token may have expired. Run gtm-setup to refresh credentials.