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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - Agent runs are assembled by the heartbeat service from agent config, project workspaces, environment config, secret bindings, skills, and runtime session state. > - The heartbeat service intentionally reuses adapter sessions, execution workspaces, and sandbox leases when that preserves useful state. > - Reuse becomes incorrect when the effective next-run config changes after a saved session, workspace, or lease was created. > - Stale reuse can make a later run appear pinned to old agent, environment, secret, instruction, or workspace settings. > - This pull request records non-sensitive fingerprints for the effective session, workspace, and lease config at run boundaries. > - When those fingerprints drift, Paperclip refreshes persisted runtime config or starts fresh execution instead of reusing stale state. > - The benefit is predictable next-run config freshness without storing raw secret values, full env maps, provider credentials, or private path details. ## Linked Issues or Issue Description - Refs #8058 - Related PRs checked during dedup search: #4968, #4155, #84, #8480. These cover nearby workspace/session routing or model-config freshness areas, but do not duplicate this effective run config fingerprinting path. ## What Changed - Added effective run config fingerprinting for session, workspace, and lease reuse decisions, with canonicalization that ignores generated runtime noise and redacts sensitive values. - Updated heartbeat reuse logic to compare stored and next-run fingerprints, reset stale saved sessions, refresh persisted workspace config snapshots, replace stale reused workspaces when required, and avoid stale sandbox lease reuse. - Included plain environment value drift via value hashes, without storing the raw env values. - Root-bound instruction content hashing so legacy direct absolute instruction paths are represented but not read for config fingerprints. - Batched secret/version metadata lookups for environment lease fingerprinting. - Added workspace operation/run result freshness metadata so operators can inspect non-sensitive decision categories. - Surfaced config freshness labels and next-run copy in the UI and docs. - Added focused coverage for fingerprint redaction, session reset decisions, workspace refresh/replace behavior, environment lease drift, and persisted workspace restoration. ## Verification - `git diff --check` - Sensitive-data scan before push: - `git diff --unified=0 origin/master...HEAD | rg -n --pcre2 "(AWS_ACCESS_KEY_ID|AWS_SECRET_ACCESS_KEY|ghp_[A-Za-z0-9_]{20,}|github_pat_[A-Za-z0-9_]{20,}|sk-[A-Za-z0-9]{20,}|-----BEGIN (RSA |OPENSSH |EC |DSA )?PRIVATE KEY-----|AKIA[0-9A-Z]{16})"` - `git diff --unified=0 origin/master...HEAD | rg -n --pcre2 "[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}"` - `pnpm exec vitest run server/src/__tests__/effective-run-config-fingerprints.test.ts server/src/__tests__/heartbeat-workspace-session.test.ts server/src/__tests__/environment-runtime.test.ts` - `pnpm --filter @paperclipai/server typecheck` - `pnpm -r typecheck` - `pnpm --filter @paperclipai/db clean` - `pnpm test:run` - `pnpm build` - UI screenshots from Cutter: - https://artifacts.cutter.sh/8797/run-2f4827c-2026-06-30T18-57-25/preview/change-01.png - https://artifacts.cutter.sh/8797/run-2f4827c-2026-06-30T18-57-25/preview/change-02.png - https://artifacts.cutter.sh/8797/run-2f4827c-2026-06-30T18-57-25/preview/change-03.png ## Risks - Medium: overly broad fingerprints could start fresh sessions, workspaces, or sandbox leases more often than necessary. - Medium: missing a config category would allow stale reuse to persist for that category. - Medium: legacy direct absolute instruction paths are no longer content-hashed unless they are paired with an absolute managed instructions root. - Low data risk: fingerprint metadata stores hashes and category names, not raw secrets, raw env values, provider credentials, or private path details. > For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and discuss it in `#dev` before opening the PR. Feature PRs that overlap with planned core work may need to be redirected — check the roadmap first. See `CONTRIBUTING.md`. ## Model Used OpenAI GPT-5 via Codex CLI / Codex coding agent, tool-enabled with shell, Git, GitHub CLI, local test execution, and code editing. The exact deployed model variant and context window are not exposed by this environment. ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge --------- Co-authored-by: Paperclip <noreply@paperclip.ing> Co-authored-by: Cody <cody@paperclip.ing>
