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‎docs/upstream-proposals/standards--hypatia-baseline-consumer/.machine_readable/hypatia-baseline.schema.json‎

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{
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"$schema": "https://json-schema.org/draft/2020-12/schema",
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"$id": "https://github.com/hyperpolymath/standards/blob/main/.machine_readable/hypatia-baseline.schema.json",
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"title": "Hypatia per-repo baseline",
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"description": "Authoritative schema for `.hypatia-baseline.json` files in hyperpolymath estate repos. A baseline is an array of acknowledged Hypatia findings that should be suppressed from blocking governance gates.",
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"type": "array",
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"items": {
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"$ref": "#/$defs/BaselineEntry"
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},
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"$defs": {
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"BaselineEntry": {
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"type": "object",
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"additionalProperties": false,
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"required": ["severity", "rule_module", "type"],
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"oneOf": [
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{ "required": ["file"] },
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{ "required": ["file_pattern"] }
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],
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"properties": {
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"severity": {
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"description": "Severity of the finding as reported by Hypatia. Must match the finding's severity exactly for the entry to apply.",
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"type": "string",
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"enum": ["critical", "high", "medium", "low", "info"]
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},
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"rule_module": {
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"description": "Hypatia rule module that emitted the finding (e.g. `cicd_rules`, `code_safety`, `migration_rules`).",
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"type": "string",
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"pattern": "^[a-z][a-z0-9_]*$"
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},
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"type": {
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"description": "Hypatia finding type within the rule module (e.g. `banned_language_file`, `obj_magic`, `deprecated_api`).",
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"type": "string",
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"pattern": "^[a-z][a-z0-9_]*$"
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},
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"file": {
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"description": "Repo-relative path to a single file the entry exempts. Mutually exclusive with `file_pattern`.",
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"type": "string",
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"minLength": 1
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},
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"file_pattern": {
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"description": "Glob pattern (gitignore-style) matching multiple files. Use to exempt a whole subtree without per-file enumeration. Mutually exclusive with `file`.",
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"type": "string",
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"minLength": 1
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},
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"severity_override": {
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"description": "Optional. If set, the matched finding is downgraded to this severity in the gate (e.g. `low` for migration-window acknowledgement) instead of being silently suppressed. Useful for advisory-mode triage.",
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"type": "string",
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"enum": ["critical", "high", "medium", "low", "info", "advisory"]
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},
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"expires_at": {
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"description": "Optional ISO-8601 date. After this date the entry is treated as expired and the gate fails again. Used to bound migration windows and prevent baseline rot.",
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"type": "string",
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"format": "date"
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},
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"note": {
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"description": "Optional free-text human-readable rationale. Recommended for any non-obvious entry. Linked from the gate's summary output.",
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"type": "string"
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},
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"tracking_issue": {
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"description": "Optional GitHub issue reference (e.g. `hyperpolymath/gitbot-fleet#148`) that tracks the underlying work to remove the need for this exemption.",
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"type": "string",
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"pattern": "^[A-Za-z0-9_.-]+/[A-Za-z0-9_.-]+#[0-9]+$"
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}
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}
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}
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}
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}

‎docs/upstream-proposals/standards--hypatia-baseline-consumer/README.md‎

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<!-- SPDX-License-Identifier: PMPL-1.0-or-later -->
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# Proposal: `hyperpolymath/standards` — `.hypatia-baseline.json` consumer
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**Target repo:** `hyperpolymath/standards`
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**Author:** drafted from `hyperpolymath/gitbot-fleet` issue triage of PR #198
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**Date:** 2026-05-24
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## Problem
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`hyperpolymath/standards/.github/workflows/governance-reusable.yml@main` runs
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`Language / package anti-pattern policy` against every repo that calls it.
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The rule scans the working tree for banned-language files (e.g. ReScript `.res`)
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and fails the gate if any are present.
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Repos in the estate carry a per-repo `.hypatia-baseline.json` listing
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acknowledged findings — same shape as the Hypatia findings themselves
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(`severity`, `rule_module`, `type`, `file`). The convention is well-formed,
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in active use (`hyperpolymath/gitbot-fleet/.hypatia-baseline.json` has 59
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entries), and structurally exactly what an exemption mechanism needs.
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**But the governance gate does not consume it.** PR #198
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(`hyperpolymath/gitbot-fleet#198`) has been blocked for hours by the
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`banned_language_file` rule firing on exactly the `.res` files that are
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*already listed* in that repo's baseline. The PR author tried inventing a
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second format (`.hypatia-ignore`, never read by anything) as a workaround.
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## Fix
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Make `governance-reusable.yml` read the calling repo's
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`.hypatia-baseline.json` and filter findings before the gate decides.
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This proposal ships:
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1. **`scripts/apply-baseline.sh`** — pure bash + jq, no external deps.
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Reads a findings file + the calling repo's baseline, emits filtered
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findings, exits non-zero only if unfiltered blocking findings remain.
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2. **`.machine_readable/hypatia-baseline.schema.json`** — JSON Schema
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formalising the file shape. Includes the existing required fields
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(`severity`, `rule_module`, `type`, `file`) plus three optional
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forward-compatible extensions (`file_pattern`, `severity_override`,
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`expires_at`, `note`).
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3. **`workflows/governance-reusable.yml.patch`** — the YAML diff to wire
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the baseline step into the existing reusable workflow. Drop-in.
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4. **`docs/HYPATIA-BASELINE-FORMAT.adoc`** — authoritative format doc.
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5. **`docs/EXEMPTION-MECHANISMS.adoc`** — convention doc clarifying when
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to use `.hypatia-baseline.json` vs the estate-wide
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`bot_exclusion_registry.a2ml` vs (proposed) per-PR exemptions.
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## File map
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| File in this proposal | Target path in `hyperpolymath/standards` |
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|---|---|
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| `scripts/apply-baseline.sh` | `scripts/apply-baseline.sh` |
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| `.machine_readable/hypatia-baseline.schema.json` | `.machine_readable/hypatia-baseline.schema.json` |
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| `workflows/governance-reusable.yml.patch` | apply to `.github/workflows/governance-reusable.yml` |
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| `docs/HYPATIA-BASELINE-FORMAT.adoc` | `docs/HYPATIA-BASELINE-FORMAT.adoc` |
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| `docs/EXEMPTION-MECHANISMS.adoc` | `docs/EXEMPTION-MECHANISMS.adoc` |
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## Rollout plan
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1. Land `apply-baseline.sh` + schema + docs in `standards/` (no behaviour
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change yet).
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2. Land the workflow patch in **advisory mode** first (gate still passes
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on suppressed findings, but logs unfiltered count). One week of soak.
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3. Flip to **blocking mode**: gate fails only on findings *not* matched
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by baseline.
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4. Open coordinator tracking issues per consumer repo to either
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(a) accept new findings into baseline, or (b) fix the underlying code.
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## Why not just merge `.hypatia-ignore` support too?
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Two formats with overlapping semantics is what got us into this mess.
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The proposal kills `.hypatia-ignore` explicitly (see
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`docs/EXEMPTION-MECHANISMS.adoc`). If a per-PR exemption slot is needed,
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it should be a designed mechanism (PR-body marker or label), not another
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drive-by file convention.
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## Companion upstream work (out of scope for this PR)
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- **`hyperpolymath/hypatia`** scanner should emit `baseline_status` on
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every finding (`new` / `acknowledged` / `expired`). That lets the gate
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do baseline matching at finding-emission time and produce richer PR
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comments. Tracked separately.
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- **`hyperpolymath/hypatia`** should grow a `--stale-baseline-check`
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mode that fails if the baseline references files that no longer exist
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(after `hyperpolymath/gitbot-fleet#148` migrates the ReScript subtree,
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most of its baseline entries will become ghosts).

‎docs/upstream-proposals/standards--hypatia-baseline-consumer/docs/EXEMPTION-MECHANISMS.adoc‎

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// SPDX-License-Identifier: PMPL-1.0-or-later
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= Exemption mechanisms in the hyperpolymath estate
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:toc:
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Three concentric exemption layers exist in the estate. Each addresses a
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different question and lives in a different file. Mixing them up is the
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single most common cause of "I added an ignore file but CI still fails"
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confusion.
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== Quick decision tree
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[source]
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----
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Are you trying to stop bots from WRITING to a path?
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-> use the estate-wide bot_exclusion_registry.a2ml
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Are you trying to stop the governance gate from FAILING on a
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pre-existing finding?
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-> use the per-repo .hypatia-baseline.json
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Are you trying to make a finding GO AWAY for one specific PR only?
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-> currently unsupported. See "per-PR exemptions" below.
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----
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== Layer 1: Estate-wide bot write denylist
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**File:** `hyperpolymath/standards/.machine_readable/bot_exclusion_registry.a2ml`
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**Scope:** All bots, all repos. Authoritative across the entire estate.
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**Purpose:** Tells bots what they may not *write* to. Read-only scanning
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is always allowed; only write actions (Write, Commit, CreatePr,
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CreateBranch, etc.) are gated.
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**Format:** A2ML (TOML-shaped). Three axes:
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1. `external-repos` — exact `owner/repo` matches that bots must skip.
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2. `vendored-directory-patterns` — globs that should never be edited.
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3. `remote-origin-patterns` — bail-if-origin-matches patterns.
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**Consumer:** Every bot via `shared-context::ExclusionRegistry::check()`.
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The registry is fail-closed: if the file fails to load, all bot writes
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are denied.
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**Edit when:** A new repo should be off-limits to bots, or a new
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vendored subtree should never be modified.
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**Don't use for:** Suppressing CI findings. This layer doesn't touch
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CI at all.
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== Layer 2: Per-repo Hypatia finding baseline
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**File:** `.hypatia-baseline.json` at the calling repo's root.
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**Scope:** One repo. Acknowledged findings only — not a "ignore these
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forever" file.
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**Purpose:** Tells the governance gate which Hypatia findings have been
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seen, triaged, and accepted as known debt. Findings matched by a baseline
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entry don't block CI; they're surfaced in the run summary as
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"acknowledged."
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**Format:** JSON array of `{severity, rule_module, type, file | file_pattern, ...}`
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objects. See `docs/HYPATIA-BASELINE-FORMAT.adoc` for the full schema.
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**Consumer:** `apply-baseline.sh` invoked from
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`hyperpolymath/standards/.github/workflows/governance-reusable.yml`.
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Suppresses matching findings from the gate, downgrades severity if
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`severity_override` is set, fails on expired entries.
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**Edit when:**
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* Pre-existing debt is tracked for migration (link a `tracking_issue`).
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* Vendored / third-party code triggers a rule the team can't fix.
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* Test fixtures intentionally violate a rule (with `note` explaining).
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**Don't use for:**
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* Newly-introduced findings on freshly-authored code. The rule exists
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for a reason; baselining the new file defeats it. Fix the code.
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* One-off PR-scoped suppression. Baseline edits are merged to main; they
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affect all subsequent PRs. See Layer 3.
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== Layer 3: Per-PR exemptions (NOT YET IMPLEMENTED)
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There is currently no supported per-PR exemption mechanism. PR authors
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attempting one (e.g. by inventing a `.hypatia-ignore` file) will find
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nothing reads it, and the gate will still fail. **Do not invent new
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file conventions.** If you need per-PR exemption, file an issue against
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`hyperpolymath/standards` proposing a designed mechanism.
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If a mechanism is added, it should be one of:
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1. **PR-body marker**, e.g. a fenced block:
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[source,markdown]
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----
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```hypatia-exempt
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- rule: code_safety/obj_magic
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file: bots/sustainabot/bot-integration/src/Analysis.res
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reason: Pre-migration debt; tracked in #148
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```
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----
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Pros: lives with the PR, vanishes when the PR closes, reviewable in
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the same UI as the change. Cons: requires a PR-body parser.
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2. **Label-driven**, e.g. apply `gate:exempt:code_safety` and require an
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exemption-justification comment from a CODEOWNER.
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3. **Sidecar file under `.github/pr-exemptions/`** — committed for one
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PR's lifetime, deleted at merge by a workflow.
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A formal proposal should pick one and document it explicitly.
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== Anti-patterns to reject
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These have been attempted and should be refused at review:
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* `.hypatia-ignore` (any format) — never read by anything. Reject; point
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the author at `.hypatia-baseline.json`.
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* Adding `pragma: ignore-rule` comments in source. Hypatia scans by AST
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and ignores comments; suppression has to be data-driven, not
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source-comment driven.
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* Setting `continue-on-error: true` on the governance gate. This makes
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CI lie. Use a baseline entry with `severity_override: advisory`
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instead — keeps the finding visible while unblocking the gate.
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* Adding the offending path to `.gitignore`. The file still exists in
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history; Hypatia and other estate scanners still see it.
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* Forking `hyperpolymath/standards` to disable the rule for one repo.
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If a rule is wrong for one repo, the rule needs scoping in the
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upstream, not a fork.
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== Cross-references
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* `docs/HYPATIA-BASELINE-FORMAT.adoc` — the baseline file format.
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* `.machine_readable/hypatia-baseline.schema.json` — machine schema.
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* `hyperpolymath/standards#????` — proposal that landed this consumer.
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* `hyperpolymath/hypatia` — the scanner that emits findings.

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