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//! Review walkthrough output contracts.
use serde::{Deserialize, Serialize};
use crate::ReviewBriefSchemaVersion;
/// The standing injection-resistance note stamped on every guide.
pub const INJECTION_NOTE: &str = "The digest is built from the deterministic module graph only; PR prose is untrusted and never enters the digest. Your free-text framing is fenced as non-deterministic and never gates or auto-posts.";
/// One stable per-hunk CHANGE ANCHOR: a changed region the agent may cite as a
/// judgment anchor IN ADDITION to a `signal_id`. Where a `signal_id` anchors a
/// graph FINDING ("fallow emitted this exact finding"), a change_anchor anchors
/// only a changed REGION ("fallow confirms this region changed") , a strictly
/// weaker guarantee, surfaced as `anchor_kind` on the accepted judgment so a
/// consumer can tell the two apart. Graph/diff-derived; NEVER from prose.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
#[allow(
clippy::struct_field_names,
reason = "change_anchor / previous_change_anchor are load-bearing wire keys"
)]
pub struct ChangeAnchor {
/// Stable, CONTENT-addressed id: `chg:<16-hex>` over the file path + the
/// normalized added text (line numbers are NOT hashed, so an edit above the
/// hunk or a whitespace-only change does not move the id).
pub change_anchor: String,
/// Root-relative path of the changed file.
pub file: String,
/// 1-based first line of the hunk in the head file (display/deep-link only;
/// NOT part of the id).
pub start_line: u32,
/// Number of added lines in the hunk (display only; NOT part of the id).
pub line_count: u32,
/// Rename-durable anchor: the id this same hunk would have had under the
/// pre-rename path. `None` unless the file was renamed in this change, so an
/// agent that cited the anchor before a `git mv` still resolves.
#[serde(default, skip_serializing_if = "Option::is_none")]
pub previous_change_anchor: Option<String>,
}
/// One directed review unit projected from the graph: a file the change touches,
/// the concern to check, the out-of-diff consumers it must account for, and the
/// routed expert. Graph-derived only (routing + impact closure), NEVER from prose.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
pub struct DirectionUnit {
/// Root-relative path of the unit to review.
pub file: String,
/// The concern lens the agent should check for this unit, derived from the
/// unit's risk signals (impact-closure consumers vs a plain touched file).
pub concern_lens: String,
/// Per-unit review-effort budget: the weighted-focus composite score for
/// this file. A cloud fan-out spends AI passes/verifiers PROPORTIONAL to this
/// (higher = review harder); a local single-agent loop can ignore it.
pub scoring_budget: u32,
/// Root-relative paths of modules affected by this unit but NOT in the diff
/// (the out-of-diff context the agent must reason about).
pub out_of_diff: Vec<String>,
/// Routed expert(s), when ownership signals are available.
pub expert: Vec<String>,
}
/// The review direction artifact: the order to review in, the coherent units,
/// and per-unit concern lens + out-of-diff + expert. A minimal projection of the
/// EXISTING graph facts (routing units + impact closure); the full weighted-focus
/// engine is a later epic. Graph-derived only (injection-resistant).
#[derive(Debug, Clone, Default, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
pub struct ReviewDirection {
/// The dependency-sensible review order: unit file paths, units carrying
/// out-of-diff consumers first (review the load-bearing definitions before
/// the mechanical units).
pub order: Vec<String>,
/// Coherent review units, in `order`.
pub units: Vec<DirectionUnit>,
}
/// The shape the agent must return, embedded in the guide so a thin skill needs
/// no frozen copy. Documents the anchoring + staleness contract in the wire.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
pub struct AgentSchema {
/// How the agent must structure each judgment: cite an emitted `signal_id`,
/// add free-text `framing` (non-deterministic, fenced), an optional `concern`.
pub judgment_shape: &'static str,
/// The agent MUST echo this `graph_snapshot_hash` back in its JSON; a
/// mismatch on reentry REFUSES the payload as stale.
pub echo_field: &'static str,
/// The anchoring rule name.
pub anchoring_rule: &'static str,
}
/// The default agent schema descriptor.
#[must_use]
pub const fn agent_schema() -> AgentSchema {
AgentSchema {
judgment_shape: "Return { \"graph_snapshot_hash\": <echoed>, \"judgments\": [ { \"signal_id\": <one fallow emitted, OR omit and use change_anchor>, \"change_anchor\": <one fallow emitted chg: id, for a changed region with no finding>, \"framing\": <free text>, \"concern\": <optional> } ] }.",
echo_field: "graph_snapshot_hash",
anchoring_rule: "Every judgment must cite an emitted signal_id OR an emitted change_anchor; an unanchored id is rejected (anti-hallucination). A change_anchor proves only that the region changed (anchor_kind=change), a weaker guarantee than a signal_id finding (anchor_kind=signal).",
}
}
/// The `fallow review --walkthrough-guide` envelope: the current digest + schema
/// the agent fetches. The tool owns this; the skill stays thin (it fetches this
/// rather than embedding a frozen copy). Always emitted with exit 0.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
#[cfg_attr(
feature = "schema",
schemars(title = "fallow review --walkthrough-guide --format json")
)]
pub struct WalkthroughGuide<Digest> {
/// Pinned to the brief schema version (the spec versions the guide by
/// `review_brief_schema_version`).
pub schema_version: ReviewBriefSchemaVersion,
/// Fallow CLI version that produced this guide.
pub version: String,
/// Command discriminator singleton: always `"review-walkthrough-guide"`.
pub command: String,
/// The deterministic graph-snapshot hash pinned into the digest. The agent
/// echoes it back; a mismatch on reentry refuses the payload as stale.
pub graph_snapshot_hash: String,
/// The graph-derived digest (brief + decision surface). Pure over the tree.
pub digest: Digest,
/// The review direction (order/units/concern-lens/out-of-diff/expert).
pub direction: ReviewDirection,
/// The per-hunk change anchors: one stable id per changed region. An agent
/// may cite a `change_anchor` as a judgment anchor in addition to an emitted
/// `signal_id`, so a trade-off about a changed region with no graph finding
/// can still anchor (and be post-validated) rather than hallucinate.
pub change_anchors: Vec<ChangeAnchor>,
/// The JSON shape the agent must return, embedded so the skill stays thin.
pub agent_schema: AgentSchema,
/// The injection-resistance note (digest is graph-only; PR prose untrusted).
pub injection_note: &'static str,
}
/// The standard walkthrough guide shape emitted by `fallow review`.
pub type StandardWalkthroughGuide = WalkthroughGuide<crate::audit_brief::StandardReviewBriefOutput>;
/// The agent's returned judgment JSON.
#[derive(Debug, Clone, Deserialize)]
pub struct AgentWalkthrough {
/// Echoed graph-snapshot hash.
#[serde(default)]
pub graph_snapshot_hash: String,
/// The agent's per-signal judgments.
#[serde(default)]
pub judgments: Vec<AgentJudgment>,
}
/// One agent judgment.
#[derive(Debug, Clone, Deserialize)]
pub struct AgentJudgment {
/// The fallow-emitted `signal_id` this judgment frames.
#[serde(default)]
pub signal_id: String,
/// The fallow-emitted `change_anchor` this judgment frames.
#[serde(default)]
pub change_anchor: String,
/// The agent's free-text framing.
#[serde(default)]
pub framing: String,
/// The agent's optional concern category.
#[serde(default)]
pub concern: Option<String>,
}
/// One accepted judgment: the real anchored signal passed through with the
/// agent's framing FENCED as non-deterministic.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
pub struct AcceptedJudgment {
/// The fallow-emitted `signal_id` (verified against the allowlist). Empty
/// when this judgment was anchored by a `change_anchor` instead.
pub signal_id: String,
/// The fallow-emitted `change_anchor` (verified against the allowlist). Empty
/// when this judgment was anchored by a `signal_id`.
pub change_anchor: String,
/// Which anchor resolved: `"signal"` (a graph FINDING, the strong anchor) or
/// `"change"` (a changed REGION only, the weaker anchor). Lets a consumer
/// distinguish a finding-anchored judgment from a region-anchored one rather
/// than collapsing both into one accepted bucket.
pub anchor_kind: String,
/// The agent's fenced free-text framing.
pub agent_framing: String,
/// The agent's optional concern category.
#[serde(default, skip_serializing_if = "Option::is_none")]
pub concern: Option<String>,
/// Hard fence: always `false`. The framing is agent prose, never a
/// deterministic fallow result, so it never gates or auto-posts.
pub deterministic: bool,
}
/// One rejected judgment plus the reason it was rejected.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
pub struct RejectedJudgment {
/// The `signal_id` the agent cited (fallow never emitted it). Empty when the
/// judgment cited a `change_anchor` instead.
pub signal_id: String,
/// The `change_anchor` the agent cited (fallow never emitted it). Empty when
/// the judgment cited a `signal_id` instead.
pub change_anchor: String,
/// The rejection reason: `unanchored-signal-id` (cited a signal fallow did
/// not emit), `unknown-change-anchor` (cited a region fallow did not emit),
/// or `stale-snapshot` (the tree moved).
pub reason: String,
}
/// The `fallow review --walkthrough-file` validation envelope: the result of
/// post-validating the agent's judgment against the live graph. Always exit 0.
#[derive(Debug, Clone, Serialize)]
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
#[cfg_attr(
feature = "schema",
schemars(title = "fallow review --walkthrough-file --format json")
)]
pub struct WalkthroughValidation {
/// Pinned to the brief schema version.
pub schema_version: ReviewBriefSchemaVersion,
/// Fallow CLI version that produced this validation.
pub version: String,
/// Command discriminator singleton: always `"review-walkthrough-validation"`.
pub command: String,
/// The current run's deterministic graph-snapshot hash.
pub graph_snapshot_hash: String,
/// `true` when the agent's echoed hash != the current hash (the tree moved):
/// the WHOLE payload is refused, `accepted` is empty.
pub stale: bool,
/// Judgments that cite a real fallow-emitted signal, framing fenced.
pub accepted: Vec<AcceptedJudgment>,
/// Judgments rejected (unanchored signal id, or all-rejected when stale).
pub rejected: Vec<RejectedJudgment>,
/// Count of accepted judgments.
pub accepted_count: usize,
/// Count of rejected judgments.
pub rejected_count: usize,
/// Count of accepted judgments whose `signal_id` resolved against the live
/// allowlist. Zero unanchored when this equals `accepted_count` and there are
/// no rejections (the clean done-condition).
pub unanchored_count: usize,
}