---
phase: 26-add-oauth-support-to-load-testing
plan: 02
subsystem: auth
tags: [oauth, code-dedup, re-export, mcp-tester]

# Dependency graph
requires:
  - phase: 26-add-oauth-support-to-load-testing
    plan: 01
    provides: "OAuthHelper at pmcp::client::oauth behind oauth feature flag"
provides:
  - "mcp-tester consumes OAuth from pmcp core SDK instead of local copy"
  - "723 lines of duplicated OAuth code eliminated"
  - "Backward-compatible re-exports: mcp_tester::{OAuthConfig, OAuthHelper, oauth}"
affects: [26-03, 26-04]

# Tech tracking
tech-stack:
  added: []
  patterns: [re-export from core SDK for workspace crate dedup]

key-files:
  created: []
  modified:
    - crates/mcp-tester/Cargo.toml
    - crates/mcp-tester/src/lib.rs
    - crates/mcp-tester/src/main.rs
  deleted:
    - crates/mcp-tester/src/oauth.rs

key-decisions:
  - "Kept base64 and rand deps in mcp-tester since tester.rs uses them independently of oauth"
  - "url dep kept since tester.rs and diagnostics.rs use Url directly"
  - "Removed sha2, webbrowser, dirs deps since they were only used by local oauth.rs"

patterns-established:
  - "Workspace crate dedup: re-export core SDK modules via pub use pmcp::client::module"

requirements-completed: [OAUTH-03]

# Metrics
duration: 3min
completed: 2026-03-01
---

# Phase 26 Plan 02: Wire mcp-tester to SDK OAuthHelper Summary

**mcp-tester now imports OAuthHelper from pmcp::client::oauth, eliminating 723 lines of duplicated OAuth code**

## Performance

- **Duration:** 3 min
- **Started:** 2026-03-01T02:20:42Z
- **Completed:** 2026-03-01T02:23:53Z
- **Tasks:** 2
- **Files modified:** 3 (plus 1 deleted)

## Accomplishments
- Enabled `oauth` feature on pmcp dependency in mcp-tester Cargo.toml
- Replaced local `pub mod oauth` with re-exports from `pmcp::client::oauth` in lib.rs
- Deleted 723-line local oauth.rs from mcp-tester
- Updated main.rs imports to use `pmcp::client::oauth::{OAuthConfig, OAuthHelper, default_cache_path}`
- Removed 3 now-unnecessary dependencies (sha2, webbrowser, dirs)

## Task Commits

Each task was committed atomically:

1. **Task 1: Enable oauth feature and update lib.rs** - `c5a07d9` (feat)
2. **Task 2: Delete local oauth.rs and update main.rs imports** - `a56a77b` (feat)

## Files Created/Modified
- `crates/mcp-tester/Cargo.toml` - Added oauth feature, removed sha2/webbrowser/dirs deps
- `crates/mcp-tester/src/lib.rs` - Re-exports from pmcp::client::oauth instead of local module
- `crates/mcp-tester/src/main.rs` - Imports OAuthConfig, OAuthHelper, default_cache_path from pmcp
- `crates/mcp-tester/src/oauth.rs` - DELETED (723 lines of duplicated code)

## Decisions Made
- Kept base64, rand, url dependencies in mcp-tester since they are used by tester.rs and diagnostics.rs independently of OAuth
- Only removed sha2, webbrowser, dirs which were exclusively used by the local oauth.rs

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- mcp-tester now consumes OAuthHelper from the core SDK
- Ready for Plan 03 (wire OAuth into cargo-pmcp loadtest command)
- Ready for Plan 04 (integration testing)

## Self-Check: PASSED

All files verified present, all commits verified in git log, oauth.rs confirmed deleted.

---
*Phase: 26-add-oauth-support-to-load-testing*
*Completed: 2026-03-01*
