docs(contributor-growth): add contributor-to-committer to family README and move to Mentoring mode

docs/contributor-growth/README.md

@@ -24,9 +24,10 @@
 
 Maintainer-facing skills that span the contributor-to-committer path:
 welcoming first-time contributors, keeping the issue backlog newcomer-
-ready, tracking contribution activity, assembling nomination evidence,
-and walking nominators through post-vote onboarding. Five skills cover
-the staged path from first contact through committer promotion.
+ready, tracking contribution activity, checking readiness against declared
+thresholds, assembling nomination evidence, and walking nominators through
+post-vote onboarding. Six skills cover the staged path from first contact
+through committer promotion.
 
 Why a framework skill family? The contributor-to-committer path is one
 of the highest-leverage levers an open-source project has for long-term
@@ -42,6 +43,7 @@ them makes the adopter configuration and the evaluation story coherent.
 | **First contact** | [`mentoring-welcome`](../../skills/mentoring-welcome/SKILL.md) | Drafts an orientation comment for a first-time contributor on a newly opened issue or PR; detects first-time authorship via the GitHub `author_association` field and skips repeat contributors. |
 | **Issue on-ramp** | [`good-first-issue-author`](../../skills/good-first-issue-author/SKILL.md) | Drafts one net-new good first issue from a supplied gap or small task; a suitability gate and R1–R9 readiness checklist gate the draft; waits for maintainer confirmation before filing via `gh`. |
 | **Activity tracking** | [`contributor-activity-sweep`](../../skills/contributor-activity-sweep/SKILL.md) | Produces a read-only GitHub activity card (PRs authored, code reviews, issues, comments) over a configurable window. |
+| **Readiness check** | [`contributor-to-committer`](../../skills/contributor-to-committer/SKILL.md) | Maps a contributor's GitHub activity against the adopter's PMC-declared committer or PMC thresholds; surfaces a traffic-light brief (Not yet / Approaching / Ready to nominate) and a gap table showing what would close each remaining gap. Read-only; never opens a nomination thread. |
 | **Nomination brief** | [`contributor-nomination`](../../skills/contributor-nomination/SKILL.md) | Assembles evidence prose for a committer or PMC vote thread: activity breadth, consistency, vendor-neutrality context, and a nomination-ready summary. Read-only; never posts to any list. |
 | **Post-vote onboarding** | [`committer-onboarding`](../../skills/committer-onboarding/SKILL.md) | Walks the nominator through ICLA check, account provisioning, permissions grant, and the welcome announcement for committer and PMC promotions at ASF TLPs and podlings. |
 
@@ -53,13 +55,14 @@ without explicit maintainer confirmation.
 
 | Skill | Mode | Status |
 |---|---|---|
-| [`mentoring-welcome`](../../skills/mentoring-welcome/SKILL.md) | Agentic Mentoring | experimental |
-| [`good-first-issue-author`](../../skills/good-first-issue-author/SKILL.md) | Agentic Mentoring | experimental |
-| [`contributor-activity-sweep`](../../skills/contributor-activity-sweep/SKILL.md) | Agentic Triage | experimental |
-| [`contributor-nomination`](../../skills/contributor-nomination/SKILL.md) | Agentic Triage | experimental |
-| [`committer-onboarding`](../../skills/committer-onboarding/SKILL.md) | Agentic Triage | experimental |
-
-All five skills are `experimental`; no adopter has run the full
+| [`mentoring-welcome`](../../skills/mentoring-welcome/SKILL.md) | Mentoring | experimental |
+| [`good-first-issue-author`](../../skills/good-first-issue-author/SKILL.md) | Mentoring | experimental |
+| [`contributor-activity-sweep`](../../skills/contributor-activity-sweep/SKILL.md) | Triage | experimental |
+| [`contributor-to-committer`](../../skills/contributor-to-committer/SKILL.md) | Mentoring | experimental |
+| [`contributor-nomination`](../../skills/contributor-nomination/SKILL.md) | Triage | experimental |
+| [`committer-onboarding`](../../skills/committer-onboarding/SKILL.md) | Triage | experimental |
+
+All six skills are `experimental`; no adopter has run the full
 contributor-to-committer path under evaluation conditions yet.
 
 ## Family boundary
@@ -93,13 +96,14 @@ adopter's `<project-config>/` directory:
 |---|---|
 | [`project.md`](../../projects/_template/project.md) | all skills (upstream repo slug, GitHub token context, `<tracker>` reference) |
 | [`pmc-roster.md`](../../projects/_template/pmc-roster.md) | `contributor-nomination`, `committer-onboarding` (PMC and committer rosters, ICLA-checker URL) |
-| [`contributor-nomination-config.md`](../../projects/_template/contributor-nomination-config.md) | `contributor-nomination` (activity-window length, committer / PMC thresholds, required-areas gates) |
+| [`contributor-nomination-config.md`](../../projects/_template/contributor-nomination-config.md) | `contributor-nomination` (activity-window length, committer / PMC thresholds, required-areas gates); also used by `contributor-to-committer` as a fallback when `committer-readiness.md` is absent |
+| [`committer-readiness.md`](../../projects/_template/committer-readiness.md) | `contributor-to-committer` (per-target threshold tables for committer/PMC readiness, assessment window; takes precedence over `contributor-nomination-config.md`) |
 | [`mentoring-welcome-config.md`](../../projects/_template/mentoring-welcome-config.md) | `mentoring-welcome` (tone knobs, contributing-doc links, AI-attribution footer wording) |
 | [`good-first-issue-config.md`](../../projects/_template/good-first-issue-config.md) | `good-first-issue-author` (issue-tracker URL, getting-started link, out-of-scope topic list) |
 
 ## Status
 
-**Experimental.** All five skills are on main with eval suites; no
+**Experimental.** All six skills are on main with eval suites; no
 adopter has run the full contributor-to-committer path end-to-end under
 evaluation conditions.
 

docs/modes.md

@@ -56,11 +56,11 @@ Autonomous* (the renamed former *Auto-merge*).
 
 | Mode | Purpose | Status | Skill count |
 |---|---|---|---|
-| **Triage** | *(Agentic Triage)* Issues, security reports, PRs: spot, classify, route, surface duplicates. Every output is a suggestion the human signs off on. | stable (security) / experimental (pr-management, issue-management, contributor-nomination, repo-health, release-management) | 31 |
-| **Mentoring** | *(Agentic Mentoring)* Joins issue and PR threads in a teaching register: clarifying questions, pointers to project conventions, paired examples from prior PRs, hand-off to a human when scope exceeds the agent. Also authors net-new good first issues to lower onboarding latency. | experimental | 3 |
+| **Triage** | *(Agentic Triage)* Issues, security reports, PRs: spot, classify, route, surface duplicates. Every output is a suggestion the human signs off on. | stable (security) / experimental (pr-management, issue-management, contributor-nomination, repo-health, release-management) | 30 |
+| **Mentoring** | *(Agentic Mentoring)* Joins issue and PR threads in a teaching register: clarifying questions, pointers to project conventions, paired examples from prior PRs, hand-off to a human when scope exceeds the agent. Also authors net-new good first issues to lower onboarding latency. | experimental | 4 |
 | **Drafting** | *(Agentic Drafting)* Agent drafts a fix for a well-scoped problem and opens a PR; every PR is reviewed and merged by a human committer. | stable (security-only); experimental (issue-management, audit-findings, release-management family) | 9 |
 | **Pairing** | *(Agentic Pairing)* Developer-side dev-cycle skills with mentorship intrinsic — multi-agent review pipelines, self-review and pre-flight patterns, scoped fix drafting under the developer's driver's seat. | experimental | 2 |
-| **Agentic Autonomous** | Auto-merges objectively boring change classes only (lint, dependency bumps inside an allow-list, license-header insertion, formatting, broken-link repair). | off | 0 |
+| **Agentic Autonomous** | Auto-merge restricted to objectively boring change classes only (lint, dependency bumps inside an allow-list, license-header insertion, formatting, broken-link repair). | off | 0 |
 
 A few skills sit **outside** the mode taxonomy by design — see
 [Outside the modes](#outside-the-modes) below.
@@ -95,7 +95,6 @@ do not act without human review.
 | [`security-issue-import-via-forwarder`](../skills/security-issue-import-via-forwarder/SKILL.md) | Sub-skill of `security-issue-import` / `-invalidate` / `-sync` for the relay/forwarder case: reports relayed by an upstream broker (e.g. ASF security team) rather than arriving directly from the reporter. | experimental |
 | [`security-issue-import-from-scan`](../skills/security-issue-import-from-scan/SKILL.md) | Triage a security scanner's multi-finding output (via the `scan-format` adapter) into per-finding dispositions; opens tracker issues only after operator confirmation of the triage decisions. | experimental |
 | [`contributor-activity-sweep`](../skills/contributor-activity-sweep/SKILL.md) | Read-only GitHub activity card for a named contributor: PR authorship, code-review participation, issues, and comments over a configurable window. | experimental |
-| [`contributor-to-committer`](../skills/contributor-to-committer/SKILL.md) | Read-only readiness tracker mapping a contributor's GitHub activity against the adopter's PMC-declared committer/PMC thresholds; surfaces a traffic-light brief (Not yet / Approaching / Ready to nominate) plus the specific evidence gaps that remain. | experimental |
 | [`pr-management-quick-merge`](../skills/pr-management-quick-merge/SKILL.md) | Identify trivial, low-risk PRs in the `ready for maintainer review` queue that pass every quality gate and touch only supplementary areas (docs, changelog, translations, tests); surfaces candidates with diff summaries and the exact merge command. | experimental |
 | [`ci-runner-audit`](../skills/ci-runner-audit/SKILL.md) | Read-only audit of GitHub Actions workflow runner compatibility across one repo, an explicit set, one Apache project's repos, or the full Apache GitHub org. | experimental |
 | [`dependency-audit`](../skills/dependency-audit/SKILL.md) | Read-only dependency vulnerability audit: detects the project's dependency manager(s), runs the appropriate audit tool, surfaces patchable findings grouped by severity, and proposes upgrades for maintainer review. | experimental |
@@ -127,7 +126,7 @@ Three notes on the boundaries:
 
 ## Mentoring
 
-**Status: experimental. 3 skills shipped.**
+**Status: experimental. 4 skills shipped.**
 
 [`MISSION.md` § Agentic Mentoring](../MISSION.md#technical-scope) names this
 the highest-value project-side mode and the one off-the-shelf agent
@@ -140,6 +139,7 @@ choices were reviewable independently from the runtime behaviour.
 | [`pr-management-mentor`](../skills/pr-management-mentor/SKILL.md) | Draft a teaching-register comment on a single GitHub issue or PR thread; waits for maintainer confirmation before posting. | experimental |
 | [`good-first-issue-author`](../skills/good-first-issue-author/SKILL.md) | Draft one net-new good first issue from a supplied gap or small task (suitability gate + readiness checklist); waits for maintainer confirmation before filing. | experimental |
 | [`mentoring-welcome`](../skills/mentoring-welcome/SKILL.md) | Draft a first-contact orientation comment for a first-time contributor on a newly opened issue or PR; detects first-time authorship via `author_association`, drafts a welcome with contributing-guide link and expected next steps; waits for maintainer confirmation before posting. | experimental |
+| [`contributor-to-committer`](../skills/contributor-to-committer/SKILL.md) | Read-only readiness tracker mapping a contributor's GitHub activity against the adopter's PMC-declared committer/PMC thresholds; surfaces a traffic-light brief (Not yet / Approaching / Ready to nominate) plus the specific evidence gaps that remain. | experimental |
 
 | Doc | Purpose |
 |---|---|