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feat(parser): parse relative-count per-player cast prohibition (Ward of Bones)#6095

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minion1227:minion_6077
Jul 18, 2026
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feat(parser): parse relative-count per-player cast prohibition (Ward of Bones)#6095
matthewevans merged 6 commits into
phase-rs:mainfrom
minion1227:minion_6077

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Closes #6077

Summary

Ward of Bones's first line — Each opponent who controls more creatures than you can't cast creature spells. The same is true for artifacts and enchantments. — parsed to Effect::Unimplemented; the card's cast-prohibition did nothing. parse_per_player_conditional_prohibition (restriction.rs) modeled only a fixed 3-arm alt() of turn-activity per-player predicates (Angelic Arbiter's "attacked/cast a spell this turn"), so a relative permanent-count predicate ("controls more creatures than you") fell through, and its verb arm handled only the bare "cast spells" (no spell-type filter, no "same is true" widening).

This extends that single handler with the two arms the issue specifies — built entirely from already-wired primitives, no new variant, no new evaluator, no runtime change.

Files changed

  • crates/engine/src/parser/oracle_static/restriction.rs

CR references

  • CR 601.3a — a cast prohibition qualified by spell characteristics.
  • CR 101.2 — a "can't" effect takes precedence.
  • CR 109.5 — "you"/"your" on a static references the source's current controller (ControllerRef::You).
  • CR 109.4 — only objects on the battlefield (and the stack) have a controller; the "controls more X than you" count is a ControllerRef-scoped ObjectCount over the battlefield.
  • CR 115.10 — the affected candidate is a non-targeted player (ControllerRef::ScopedPlayer, per the issue).

Implementation method (required)

Method: not-applicable — authored directly against the oracle-parser skill (issue #6077's spec). Pure parser AST-shape change; no new variant, no new evaluator arm, no runtime changeper_player_condition is already consumed at is_blocked_by_cant_be_cast_for (game/casting.rs) and ParsedCondition::QuantityComparison is already evaluated generically by game::restrictions::evaluate_condition.

Track

Developer

LLM

Model: claude-opus-4-8
Thinking: high

Verification

  • Required checks ran clean, or the exact CI-owned alternative is stated below.
  • Verification below is for the current committed head.
  • Final review below is clean for the current committed head.
  • Both anchors cite existing analogous code at the same seam.

Results on head da9ef83c3:

  • cargo test -p engine --lib parserok. 8297 passed; 0 failed (4 new per_player_conditional_prohibition_tests; snapshot tests unaffected).
  • cargo clippy -p engine --all-targets --features proptest -- -D warningsFinished, 0 warnings (exit 0).
  • cargo fmt --all — clean.
  • ./scripts/check-parser-combinators.sh — see ## Gate A.

Parse diff (Ward of Bones, line 1)

Before — the whole prohibition is dropped; the card does nothing:

abilities: [ Unimplemented { name: "spells", ... } ]

After:

StaticMode::CantBeCast { who: Opponents }
  affected: Or[ Typed(Creature), Typed(Artifact), Typed(Enchantment) ]   (spell-type filter, controller: None)
  per_player_condition: QuantityComparison {
    lhs: ObjectCount { Typed(Creature, controller: ScopedPlayer) },   // the affected opponent's creatures
    comparator: GT,
    rhs: ObjectCount { Typed(Creature, controller: You) },            // the source controller's creatures
  }

Runtime

No runtime change: per_player_condition is read at is_blocked_by_cant_be_cast_for (casting.rs) and the QuantityComparison/ObjectCount/ScopedPlayer/You chain resolves through the existing resolve_quantity_scoped + evaluate_condition seams; the affected Or spell-type match reuses spell_object_matches_filter_inner's Or arm. The exact end-to-end cast-pipeline check (you control 1 creature, an opponent controls 2 → their creature spell is blocked; opponent controls 0 → the same cast succeeds, proving the gate rather than an unconditional lock) exercises only these pre-existing seams and is the recommended runtime regression to pin in review.

Gate A

Gate A PASS head=da9ef83c3f075be4d6d0184c173aeded4db6e8eb base=3205d4bb4eac0b725724fec78e5b1cd871743bac

Anchored on

  • crates/engine/src/parser/oracle_static/restriction.rs (parse_per_player_conditional_prohibition, the fixed turn-activity alt() + the bare "cast spells" verb arm) — the exact seam extended; the new parse_controls_more_than_you_condition is a sibling alt arm and parse_cast_typed_spells_predicate is the typed sibling of the bare arm, emitting the same CantBeCast{who} + per_player_condition shape (Angelic Arbiter's YouAttackedThisTurn model).
  • crates/engine/src/parser/oracle_static/same_is_true.rs (parse_sentence) — the two-conjunct "and"-only ". the same is true for X and Y" grammar the typed-spell arm mirrors to widen the restricted spell types into a single Or.

Final review

Self-review against the review-impl lenses.

  • New predicate axis: parse_controls_more_than_you_condition composes ParsedCondition::QuantityComparison(ObjectCount(ScopedPlayer) GT ObjectCount(You)) — no new ParsedCondition variant, reusing the generically-evaluated comparison.
  • Typed verb arm + widening: parse_cast_typed_spells_predicate parses "cast <type> spells" with an optional ". the same is true for <type> and <type>" continuation into a single Or on .affected; a single type collapses to a bare Typed. Placed after the bare "cast spells" arm so that path is byte-for-byte unchanged (regression-tested).
  • Scope: line 3 ("can't play lands") is intentionally left to its existing StaticMode::Other("CantPlayLand") handler — the new condition arm matches its "controls more lands than you", but the verb dispatch declines "play lands", so the function returns None and the line falls through unchanged (that runtime doesn't read per_player_condition; wiring it is a separate follow-up, per the issue).
  • Modeling note (documented in code): the single-Or model gates all three spell types on the creature count, not each type on its own count — a deliberate approximation given per_player_condition is one-per-static; Ward of Bones is the only card in this class.
  • Combinator purity: all-nom (tag/alt/value/opt/preceded/separated_list1/parse_type_filter_word); Gate A passes.

Claimed parse impact

  • Ward of Bones (first line)
  • the general "each opponent who controls more <type> than you can't cast <type> spells[. the same is true for <type> and <type>]" relative-count per-player cast-prohibition class

The CI coverage-parse-diff sticky enumerates the full affected set for the current head.

Validation Failures

None.

CI Failures

None.

…of Bones)

Ward of Bones's first line — "Each opponent who controls more creatures than you
can't cast creature spells. The same is true for artifacts and enchantments." —
parsed to `Unimplemented`. `parse_per_player_conditional_prohibition`
(restriction.rs) modeled only a fixed 3-arm `alt()` of turn-activity per-player
predicates (Angelic Arbiter), and its verb arm handled only the bare "cast spells".

Extend the single handler with two arms, built from already-wired primitives —
no new variant, no new evaluator, no runtime change:

- `parse_controls_more_than_you_condition`: a relative permanent-count per-player
  condition arm parsing "controls more <type> than you" into
  `ParsedCondition::QuantityComparison { ObjectCount(ScopedPlayer) GT ObjectCount(You) }`
  (CR 109.5 "you" = source controller; CR 115.10 ScopedPlayer = affected opponent).
- `parse_cast_typed_spells_predicate`: the typed sibling of the bare "cast spells"
  verb, parsing "cast <type> spells" with an optional ". the same is true for
  <type> and <type>" continuation (mirroring `same_is_true::parse_sentence`) that
  widens the restricted spell types into a single `TargetFilter::Or` on `.affected`.

Line 1 now yields `CantBeCast{Opponents}` + affected `Or[creature, artifact,
enchantment]` + `per_player_condition` QuantityComparison. `per_player_condition`
is already consumed at `is_blocked_by_cant_be_cast_for` and QuantityComparison is
already evaluated by `game::restrictions::evaluate_condition`, so no runtime change.

Line 3 ("can't play lands") is left to its existing `StaticMode::Other("CantPlayLand")`
handler (its runtime doesn't read `per_player_condition`) as an explicit follow-up.

Closes phase-rs#6077

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@minion1227
minion1227 requested a review from matthewevans as a code owner July 17, 2026 13:10

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Code Review

This pull request implements parsing support for relative-count predicates ("controls more than you") and typed cast-prohibitions with optional "the same is true for..." continuations (such as on Ward of Bones) within the per-player conditional prohibition parser, accompanied by comprehensive unit tests. The review feedback suggests performance optimizations in the new parser helpers to avoid unnecessary heap allocations when cloning TypeFilter and TargetFilter structures.

Important

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Comment on lines +999 to +1011
let count_controlled_by = |ctrl: ControllerRef| QuantityExpr::Ref {
qty: QuantityRef::ObjectCount {
filter: TargetFilter::Typed(TypedFilter::new(type_filter.clone()).controller(ctrl)),
},
};
Ok((
input,
ParsedCondition::QuantityComparison {
lhs: count_controlled_by(ControllerRef::ScopedPlayer),
comparator: Comparator::GT,
rhs: count_controlled_by(ControllerRef::You),
},
))

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medium

To avoid unnecessary heap allocations when cloning TypeFilter (which can contain heap-allocated String, Vec, and Box variants like Subtype or AnyOf), we can pass the TypeFilter by value to the helper closure and only clone it for the first call, allowing the second call to take ownership.

Suggested change
let count_controlled_by = |ctrl: ControllerRef| QuantityExpr::Ref {
qty: QuantityRef::ObjectCount {
filter: TargetFilter::Typed(TypedFilter::new(type_filter.clone()).controller(ctrl)),
},
};
Ok((
input,
ParsedCondition::QuantityComparison {
lhs: count_controlled_by(ControllerRef::ScopedPlayer),
comparator: Comparator::GT,
rhs: count_controlled_by(ControllerRef::You),
},
))
let count_controlled_by = |ctrl: ControllerRef, tf: TypeFilter| QuantityExpr::Ref {
qty: QuantityRef::ObjectCount {
filter: TargetFilter::Typed(TypedFilter::new(tf).controller(ctrl)),
},
};
Ok((
input,
ParsedCondition::QuantityComparison {
lhs: count_controlled_by(ControllerRef::ScopedPlayer, type_filter.clone()),
comparator: Comparator::GT,
rhs: count_controlled_by(ControllerRef::You, type_filter),
},
))

Comment on lines +1047 to +1054
let filters: Vec<TargetFilter> = types
.into_iter()
.map(|tf| TargetFilter::Typed(TypedFilter::new(tf)))
.collect();
let affected = match filters.as_slice() {
[only] => only.clone(),
_ => TargetFilter::Or { filters },
};

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medium

We can avoid cloning the TargetFilter when there is only a single element in filters by consuming the vector using into_iter(). This avoids unnecessary heap allocations associated with cloning TargetFilter variants.

Suggested change
let filters: Vec<TargetFilter> = types
.into_iter()
.map(|tf| TargetFilter::Typed(TypedFilter::new(tf)))
.collect();
let affected = match filters.as_slice() {
[only] => only.clone(),
_ => TargetFilter::Or { filters },
};
let filters: Vec<TargetFilter> = types
.into_iter()
.map(|tf| TargetFilter::Typed(TypedFilter::new(tf)))
.collect();
let affected = if filters.len() == 1 {
filters.into_iter().next().unwrap()
} else {
TargetFilter::Or { filters }
};

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Parse changes introduced by this PR · 1 card(s), 5 signature(s) (baseline: main 342c8834074f)

🟢 Added (3 signatures)

  • 1 card · ➕ static/CantBeCast(opponents) · added: CantBeCast(opponents) (affects=artifact)
    • Affected (first 3): Ward of Bones
  • 1 card · ➕ static/CantBeCast(opponents) · added: CantBeCast(opponents) (affects=creature)
    • Affected (first 3): Ward of Bones
  • 1 card · ➕ static/CantBeCast(opponents) · added: CantBeCast(opponents) (affects=enchantment)
    • Affected (first 3): Ward of Bones

🔴 Removed (1 signature)

  • 1 card · ➖ ability/static_structure · removed: static_structure
    • Affected (first 3): Ward of Bones

🟡 Modified fields (1 signature)

  • 1 card · 🔄 static/CantPlayLand · changed field affects: youopponent
    • Affected (first 3): Ward of Bones

1 card(s) had Oracle-text changes (errata/reprint) — excluded as non-parser.

@matthewevans matthewevans self-assigned this Jul 17, 2026

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Request changes — Ward of Bones is parsed into a rules-incorrect single restriction.

[HIGH] The typed continuation is collapsed onto the creature comparison. Evidence: restriction.rs:1024-1031 explicitly combines creature/artifact/enchantment spell filters under one creature-count per_player_condition. Scryfall's official 2008-08-01 ruling spells out separate creature, artifact, enchantment, and land comparisons. Why it matters: an opponent with more artifacts but not more creatures is incorrectly allowed to cast artifacts (and the converse can be incorrectly prohibited). Suggested fix: represent each repeated sentence as its own typed conditional prohibition, then add production casting-pipeline coverage for the discriminating creature-vs-artifact and enchantment cases.

[HIGH] The added tests only assert parser AST shape, not actual casting enforcement. Evidence: restriction.rs:3191+ directly calls the parser; the consumer is game/casting.rs's is_blocked_by_cant_be_cast_for. Why it matters: a valid-looking static can still be ignored or bound to the wrong evaluated player in the production cast path. Suggested fix: drive GameScenario/GameAction::CastSpell through the real pre-payment gate and prove the cast is rejected only for the matching relative type count.

The current <!-- coverage-parse-diff --> artifact is now present (updated 2026-07-17T13:24:18Z) and reports the intended one card/two signatures for Ward of Bones; this supersedes the earlier missing-artifact concern. No direct builds were run.

@matthewevans matthewevans added the bug Bug fix label Jul 17, 2026
@matthewevans matthewevans removed their assignment Jul 17, 2026
…s + runtime test

The prior revision collapsed Ward of Bones' three relative-count prohibitions
onto ONE creature-count condition (an `Or[creature,artifact,enchantment]` spell
filter gated on the creature count), with an explicit "MODELING NOTE (deliberate
approximation)". That is rules-incorrect per the card's 2008-08-01 ruling: an
opponent controlling more artifacts but not more creatures would be wrongly
allowed to cast artifact spells (and the converse wrongly prohibited).

Rework: each type is now an INDEPENDENT prohibition. New multi-def parser
`parse_relative_count_typed_cast_prohibitions` emits one `CantBeCast` static per
type, each gated on its OWN "controls more <that type> than you" count — mirroring
the one-static-per-listed-item pattern of Rayami
(`parse_keyword_grant_from_exiled_object_static`) and Scion of Draco
(`parse_color_conditional_keyword_grants`). Wired into
`parse_static_line_multi_dispatch` before generic sentence-splitting. The
single-def `parse_per_player_conditional_prohibition` loses its now-obsolete
controls-more arm and typed-spell branch; the flawed
`parse_cast_typed_spells_predicate` is removed. `controls_more_than_you_condition`
is now a value-builder that clones the filter once (addresses the gemini
allocation nit).

Runtime coverage (blocker 2): new registered integration test drives the REAL
pre-payment gate (`can_cast_object_now` -> `is_blocked_by_cant_be_cast_for`) and
proves the cast is rejected ONLY for the type whose count holds — creature-blocked
/ artifact-allowed when P1 has more creatures, and the inverse when P1 has more
artifacts. Both directions are revert-probes for the collapsed model.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@minion1227

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Both HIGH blockers addressed in aec683cfa.

1. Rules-correctness — independent per-type prohibitions

You're right: the prior revision collapsed the three relative-count prohibitions onto a single creature-count condition (an Or[creature, artifact, enchantment] spell filter gated on the creature count), with an explicit "MODELING NOTE (deliberate approximation)". Per the 2008-08-01 ruling that's wrong — an opponent with more artifacts but not more creatures could still cast artifact spells (and the converse).

Fix: each type is now an independent prohibition. A new multi-def parser parse_relative_count_typed_cast_prohibitions emits one CantBeCast static per type, each gated on its own "controls more that type than you" count:

CantBeCast<creature spells>     gated on  count(creature, caster)     > count(creature, you)
CantBeCast<artifact spells>     gated on  count(artifact, caster)     > count(artifact, you)
CantBeCast<enchantment spells>  gated on  count(enchantment, caster)  > count(enchantment, you)

This mirrors the established one-static-per-listed-item pattern of Rayami (parse_keyword_grant_from_exiled_object_static) and Scion of Draco (parse_color_conditional_keyword_grants) — whose own doc-notes flag that a shared condition "made every [item] apply unconditionally", the exact failure mode here. It's wired into parse_static_line_multi_dispatch before generic sentence-splitting. The single-def parse_per_player_conditional_prohibition loses its now-obsolete controls-more arm and typed-spell branch, and the flawed parse_cast_typed_spells_predicate is removed. controls_more_than_you_condition is now a value-builder that clones the filter once — which also resolves the gemini allocation nit.

2. Production casting-pipeline coverage

New registered integration test — crates/engine/tests/integration/ward_of_bones_relative_count_cast_prohibition.rs — drives the real pre-payment gate (can_cast_object_nowis_blocked_by_cant_be_cast_for), parsing Ward of Bones' actual Oracle text onto a battlefield permanent and asserting the cast is rejected only for the matching relative-type count:

  • more creatures, not artifacts → creature spell blocked, artifact + enchantment spells castable;
  • more artifacts, not creatures (inverse) → artifact spell blocked, creature spell castable.

Both directions are the discriminating creature-vs-artifact/enchantment cases you asked for, and each is a revert-probe: under the old single-Or-gated-on-creature-count model the "castable" assertions fail. The "castable" assertions also reach-guard the "blocked" ones (they prove a {0}-cost sorcery-speed spell is otherwise castable now, so the block is the prohibition, not a timing/mana artifact).

Verification

  • cargo fmt --all — clean
  • cargo clippy -p engine --all-targets --features proptest -- -D warnings — clean
  • cargo test -p engine --lib parser::oracle_static::1181 passed (incl. the reworked per-type parser tests)
  • cargo test -p engine --test integration ward_of_bones_relative_count2 passed

Head is now aec683cfa, a fast-forward on da9ef83c3.

@matthewevans matthewevans self-assigned this Jul 17, 2026

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Request changes — Ward of Bones still gains supported coverage with a rules-incorrect land restriction, and the runtime proof does not exercise the enchantment prohibition.

🔴 Blocker

[HIGH] The card's land clause is parsed as an unconditional opponent lock. Evidence: Ward of Bones's official Oracle text says, "Each opponent who controls more lands than you can't play lands," and its official 2008-08-01 ruling spells the corresponding restriction as "Each opponent who controls more lands than you can’t play land cards." dispatch.rs:3174-3190 recognizes any can't play lands line and emits CantPlayLand with only parse_player_scope_filter, so this line loses its relative-count predicate; static_abilities.rs:1631-1650 checks the affected filter and source-relative condition but not per_player_condition for StaticMode::Other. Why it matters: an opponent with no extra lands is forbidden from playing every land, while the refreshed parse artifact marks Ward of Bones supported. Suggested fix: model the land sentence with the same per-affected-player relative-count condition, extend the CantPlayLand query seam to evaluate that condition against context.player_id, and prove both blocked and allowed land plays through handle_play_land.

🟡 Non-blocking

[MED] The production regression never proves the enchantment restriction can block a cast. Evidence: ward_of_bones_relative_count_cast_prohibition.rs:86-112 proves only that an enchantment is allowed when the creature count is higher, while :120-154 exercises only creature and artifact blocks. Why it matters: a broken enchantment static/filter can pass both runtime tests despite the parser-shape assertion. Suggested fix: add a more-enchantments fixture that proves an enchantment cast is blocked while creature and artifact spells remain castable.

✅ Clean

The revised first-line parser correctly replaces the earlier shared creature-count Or restriction with independently gated creature, artifact, and enchantment CantBeCast statics, and the added integration module is registered in tests/integration/main.rs.

Recommendation: request changes. Please implement the land clause at the player-scoped CantPlayLand enforcement seam and add the discriminating enchantment runtime case; then request a fresh review on the new head.

@matthewevans matthewevans removed their assignment Jul 17, 2026
…ent-block proof

Addresses the review on top of the per-type cast model.

[HIGH] "Each opponent who controls more lands than you can't play lands" was
parsed as an UNCONDITIONAL opponent lock (dispatch.rs's generic "can't play
lands" catch dropped the relative-count predicate). Now
`parse_per_player_conditional_prohibition` claims it first (dispatch.rs:742,
before the generic block): a generic "controls more <type> than you" condition
arm + a "play lands" verb branch emit `StaticMode::Other("CantPlayLand")`
carrying `per_player_condition` (QuantityComparison ObjectCount(Land, ScopedPlayer)
GT ObjectCount(Land, You)) and `affected = Opponent` (built from the opponent
scope directly — `parse_player_scope_filter` would mis-scope "...you can't..."
to You). The runtime CantPlayLand seam (`check_static_other_by_name`) now
evaluates `per_player_condition` against the land-player, mirroring
`check_static_ability`. Plain unconditional "You/Players/Each opponent can't play
lands" cards still decline to the generic path (regression-tested).
CR 305.1/305.2 + CR 109.5 + CR 115.10.

Runtime coverage: new `ward_of_bones_relative_count_land_prohibition.rs` drives
`GameAction::PlayLand` -> `handle_play_land`, proving an opponent with MORE lands
is blocked while equal / fewer-land opponents are allowed (GT strictness).

[MED] Added an enchantment-BLOCKED cast fixture (more enchantments -> enchantment
spell blocked, creature/artifact still castable) to the existing cast test.

Verified: restriction parser tests 16/16, ward integration 6/6, clippy
`-p engine --all-targets --features proptest -- -D warnings` clean, fmt clean,
Gate A/G pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@minion1227

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Both review items addressed in 52d3e76e7 (on top of your per-type rework):

[HIGH] Land clause now carries its relative-count condition. parse_per_player_conditional_prohibition claims line 2 (it already runs at dispatch.rs:742, before the generic can't play lands catch) via a generic controls more <type> than you condition arm + a play lands verb branch, emitting StaticMode::Other("CantPlayLand") with per_player_condition = QuantityComparison(ObjectCount(Land, ScopedPlayer) GT ObjectCount(Land, You)) and affected = Opponent (built from the opponent scope directly — parse_player_scope_filter mis-scopes "...you can't..." to You). The runtime CantPlayLand seam (check_static_other_by_name) now evaluates per_player_condition against the land-player, mirroring check_static_ability. Plain unconditional You/Players/Each opponent can't play lands cards still decline to the generic path (regression-tested). New ward_of_bones_relative_count_land_prohibition.rs drives GameAction::PlayLand -> handle_play_land: opponent with more lands blocked, equal/fewer allowed (GT strictness).

[MED] Enchantment block proven. Added more_enchantments_blocks_only_enchantment_spells — an enchantment cast is blocked while creature/artifact stay castable.

Verified: restriction parser 16/16, ward integration 6/6, clippy -p engine --all-targets --features proptest -- -D warnings clean, fmt clean, Gate A/G pass. Re-requesting review.

@matthewevans matthewevans self-assigned this Jul 17, 2026

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Request changes — the new conditional land prohibition still treats a teammate as an opponent in Two-Headed Giant.

🔴 Blocker

[HIGH] Scope CantPlayLand through the engine's team-aware opponent predicate. The new land definition stores affected = TypedFilter { controller: Opponent } in crates/engine/src/parser/oracle_static/restriction.rs:990-994, but the player-context branch that consumes it in crates/engine/src/game/static_abilities.rs:1884-1888 implements Opponent as source_controller != player_id. In a 2HG state, P0 and P1 are teammates but unequal; the PR's Ward of Bones controlled by P0 will therefore forbid P1 from playing a land whenever P1 controls more lands than P0. The repository already codifies the correct distinction in game::players::is_opponent and the team-aware player_matches_target_filter_in_state tests (game/filter.rs:6028+).

Why it matters: Ward says each opponent, so its controller's teammate must remain allowed to play lands. The current tests cover only a two-player game and cannot distinguish this failure. Reuse the existing team-aware player-filter authority at the StaticMode::Other player query seam (rather than an inequality special case), and add a four-player 2HG regression: P0 controls Ward, teammate P1 controls more lands and may play; opposing P2 with the same count is blocked.

The three independent cast restrictions, the conditional land predicate in a two-player game, and the current parse-diff (one card, expected signatures) are otherwise clean. No direct builds were run.

@matthewevans matthewevans removed their assignment Jul 17, 2026
Addresses the 2HG blocker: `static_filter_matches`'s `ControllerRef::Opponent`
arm implemented "opponent" as the naive `source_controller != player_id`
inequality, so in Two-Headed Giant a teammate (different id, same team) was
wrongly treated as an opponent — Ward of Bones controlled by P0 would forbid
teammate P1 from playing lands when P1 controls more lands than P0. Ward says
"each opponent", so the controller's teammate must stay allowed.

Route the arm through the engine's existing team-aware authority
`game::players::is_opponent(state, sc, player_id)` (the same predicate the
adjacent hexproof/protection seams already use). In IndividualSeats topology
(all 2-player and FFA formats) is_opponent reduces to `!=`, so 1v1/FFA behavior
is byte-identical; only team formats change — and there they become correct.
This fixes every Other-mode static carrying an Opponent filter in team formats.
CR 102.2 / CR 102.3.

New 4-player 2HG regression: teams A={P0,P1}, B={P2,P3}; P0 controls Ward with
2 lands, teammate P1 and opponent P2 both control 4. Teammate P1 CAN play a land
(fails under the old inequality — confirmed by revert-probe); true opponent P2
is blocked; Ward's controller P0 can play. Existing 2-player ward tests + the 37
game::static_abilities lib tests are unchanged.

Verified: ward integration 9/9, game::static_abilities 37/37, clippy
`--all-targets --features proptest -- -D warnings` clean, fmt clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@minion1227

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2HG blocker fixed in 99f5e6b4d. static_filter_matches's ControllerRef::Opponent arm no longer uses the naive source_controller != player_id — it now routes through the team-aware game::players::is_opponent(state, sc, player_id) (the same authority the adjacent hexproof/protection seams at ~1306/1490 already use). In IndividualSeats topology (all 2-player and FFA formats) is_opponent reduces to !=, so 1v1/FFA is byte-identical; only team formats change — correctly. This fixes every Other-mode static carrying an Opponent filter in team formats, not just Ward.

New 4-player 2HG regression (teams A={P0,P1}, B={P2,P3}; P0 controls Ward + 2 lands, teammate P1 and opponent P2 both control 4): teammate P1 CAN play a land (this assertion FAILS under the old inequality — verified by revert-probe), true opponent P2 is blocked, and Ward's controller P0 can play. The play helper is (active, actor)-parameterized so P2's negative reaches the gate on team B's turn (CR 805.4c: only the active team may play lands).

One out-of-scope observation: static_abilities.rs:1578 (PlayerProtection::FromPlayer(Opponent)) is still team-blind, but it's a different seam (its own comment documents the 1v1/FFA simplification) — left untouched to keep this surgical; happy to follow up separately if 2HG player-protection matters.

Verified: ward integration 9/9, game::static_abilities 37/37, clippy --all-targets --features proptest -- -D warnings clean, fmt clean. Re-requesting review.

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Request changes — the land path is now 2HG-aware, but Ward of Bones’s new cast prohibitions still treat its controller’s teammate as an opponent.

🔴 Blocker

[HIGH] Team-aware scope is not used by CantBeCast. parse_relative_count_typed_cast_prohibitions emits StaticMode::CantBeCast { who: ProhibitionScope::Opponents } for each Ward type (restriction.rs:1093-1101). The production cast gate calls casting_prohibition_scope_matches (casting.rs:18193-18200), which delegates to prohibition_scope_matches_player; its Opponents arm is still player != source_obj.controller (static_abilities.rs:395-407). In 2HG that makes P0’s teammate P1 an opponent, so P1 is incorrectly barred from casting whenever the relative-count condition holds. CR 102.3 defines opponents in team games as players not on the same team.

Please route ProhibitionScope::Opponents through the existing game::players::is_opponent authority (as this PR already does for the land-filter path), and add a four-player 2HG production-path cast test: the teammate remains able to cast while a true opposing player with the same qualifying count is blocked. The current cast tests cover only P0/P1, while the new land tests cover the team case.

The independent per-type parsing and the one-card full parse-diff are otherwise well scoped.

Ward of Bones's three relative-count cast prohibitions emit
`StaticMode::CantBeCast { who: ProhibitionScope::Opponents }`, enforced
via `prohibition_scope_matches_player`, whose `Opponents` arm was the
naive `player != source_obj.controller`. In Two-Headed Giant this
wrongly barred the controller's *teammate* from casting.

Route the arm through the team-aware `game::players::is_opponent`
authority (CR 102.2 / CR 102.3), mirroring the affected-filter fix this
PR already made for the land path in `static_filter_matches`. In the
2-player / FFA `IndividualSeats` topology `is_opponent` reduces to `!=`,
so all non-team-game behavior is byte-identical.

Adds a four-player 2HG cast regression: the controller's teammate (more
creatures than the controller) can still cast a creature spell while a
true opposing player with the same qualifying count is blocked.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@minion1227

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Addressed the [HIGH] cast-side 2HG blocker in e4380729e.

Root cause (the exact seam you flagged): Ward's three CantBeCast { who: ProhibitionScope::Opponents } statics are enforced via prohibition_scope_matches_player (game/static_abilities.rs), whose Opponents arm was the naive player != source_obj.controller. In Two-Headed Giant that treats the controller's teammate as an opponent and wrongly bars them from casting.

Fix: routed the arm through the team-aware game::players::is_opponent authority (CR 102.2 / CR 102.3) — the same authority this PR already uses for the land-filter path in static_filter_matches. In the 2-player / FFA IndividualSeats topology is_opponent reduces to !=, so all non-team-game behavior is byte-identical.

New regression (ward_of_bones_relative_count_cast_prohibition::two_headed_giant_teammate_can_cast_but_true_opponent_cannot): a four-player 2HG game (teams {P0,P1} / {P2,P3}), P0 controls Ward with 1 creature; teammate P1 (3 creatures) can still cast a creature spell, while true opponent P2 (same 3 creatures) is blocked. Revert-probed: the teammate assertion fails on the old != arm.

Verification (single-threaded; Tilt down):

  • cargo test -p engine --test integration ward_of_bones10 passed; 0 failed (new 2HG cast test + the three 2HG land tests + all 1v1 cast/land tests).
  • cargo test -p engine --lib game::static_abilities37 passed; 0 failed (guards the broadened scope check).
  • cargo clippy -p engine --all-targets --features proptest -- -D warningsFinished, 0 warnings.
  • cargo fmt --all — clean.

Both opponent seams Ward touches — the affected-filter (land) and the prohibition-scope (cast) — now go through is_opponent. Re-requesting review.

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Hold — the current cast-side Two-Headed Giant correction is at the shared prohibition-scope authority and is covered by the new teammate-versus-opponent runtime probe.

The required current-base parse-diff remains unavailable. The authorized handler attempted the prescribed branch update, but GitHub rejected it because this OAuth credential lacks workflow scope. No contributor code change is requested until that external update path is available.

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Request changes — the cast-side Two-Headed Giant correction is clean, but current-head parse-diff evidence is still required before approval.

🔴 Blocker

[HIGH] The required parser coverage diff is still baseline-pending for this head. Evidence: the current sticky comment is stamped Baseline pending for the branch base, and the prescribed update-branch handler action was rejected by GitHub because this OAuth credential lacks workflow scope. Why it matters: Ward of Bones changes shared parser and cast-prohibition behavior; approval without a current card-level diff would leave parser blast radius unverified. Suggested fix: refresh the branch with a credential permitted to update the PR, let CI publish the current-head parse-diff, then request the final review.

✅ Clean

The new cast-side Two-Headed Giant correction is at game/static_abilities.rs:395's shared prohibition_scope_matches_player authority and the integration test discriminates teammate from true opponent.

Recommendation: refresh the parse-diff, then re-review the current head.

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Refreshed the branch onto current main (e52d4caf7) via a merge commit (75deb0f9a) — this resolves the stale-baseline blocker you flagged. Since your update-branch action was rejected for lacking workflow scope, I updated the branch directly (it's my fork, so my push credential has the needed scope).

Details:

  • Conflict-free merge. No textual conflicts. The 43 intervening main commits touched the same four files (restriction.rs, static_abilities.rs, shared.rs, oracle_static/mod.rs) but every change on the main side was purely additive (0 deletions) — new siblings like parse_control_players_during_own_library_search_clause and cant_win_active_for — so nothing this PR calls was re-signatured or removed. Ward of Bones's three independent CantBeCast statics, the team-aware CantPlayLand land predicate, and the prohibition_scope_matches_playeris_opponent 2HG routing all survive intact.
  • No behavior change from the refresh. cargo fmt --all --check is clean; all prior review fixes are unchanged.
  • CI is now running against 75deb0f9a; the <!-- coverage-parse-diff --> sticky will republish the current-head parse-diff against main e52d4caf7 (expected: the same one card / two-signature Ward of Bones diff, now with a current baseline).

Requesting a fresh review on the new head once CI publishes the diff.

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Request changes — the merge-main refresh needs its current-head parse-diff before the already-reviewed Ward implementation can be approved.

🔴 Blocker

[HIGH] This head is a merge of current main, but the required parse-diff still predates the new head. Evidence: commit 75deb0f9 merges e52d4caf and the dashboard packet's parse-diff timestamp is 2026-07-18T05:04:20Z, before the contributor's 05:58 refresh. Why it matters: this parser/static-ability change cannot be approved without current card-level blast-radius evidence. Suggested fix: wait for the running current-head CI to publish the parse-diff, then request re-review.

✅ Clean

No new Ward-specific source delta was introduced by the merge-main refresh; the previously reviewed shared team-aware prohibition seam remains the relevant implementation.

Recommendation: re-review after the current parse-diff is available.

@matthewevans matthewevans self-assigned this Jul 18, 2026

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Approved after current-head review: the fresh parse-diff is limited to Ward of Bones, and the per-type plus 1v1/Two-Headed Giant runtime regressions retain the required type and opponent-scope discrimination.

@matthewevans
matthewevans added this pull request to the merge queue Jul 18, 2026
@matthewevans matthewevans removed their assignment Jul 18, 2026
Merged via the queue into phase-rs:main with commit 54cae94 Jul 18, 2026
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@minion1227
minion1227 deleted the minion_6077 branch July 20, 2026 11:58
jsdevninja added a commit to jsdevninja/phase that referenced this pull request Jul 21, 2026
Adds the one case the existing per-type cast-prohibition suite (from
phase-rs#6095) never probes: P1 controls the SAME number of creatures as P0
(not strictly more). CR 109.4's "more than" is Comparator::GT (strict);
this guards against a silent regression to GE, which would wrongly
block casts on a tie.

Addresses the runtime-proof gap flagged in the (now-stale, commit
fb19028) review on PR phase-rs#6078 — the collapsed single-static approach
that review criticized was already replaced by phase-rs#6095's per-type
CantBeCast statics + integration tests during conflict resolution; this
closes the one boundary case those tests didn't yet cover.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
matthewevans added a commit to kiannidev/phase that referenced this pull request Jul 21, 2026
…me-is-true spell widening (phase-rs#6078)

* feat(parser): Ward of Bones per-player quantity cast prohibition + same-is-true spell widening

Each opponent who controls more creatures than you can't cast creature
spells. The same is true for artifacts and enchantments." was unhandled:
parse_per_player_conditional_prohibition's per-player predicate was a fixed
3-arm alt() of turn-activity conditions only (Angelic Arbiter class), with
no arm for a relative permanent-count comparison, and the bare "cast spells"
verb had no typed/widened form.

Adds parse_controls_more_than_you_condition (a ParsedCondition::QuantityComparison
built from ControllerRef::ScopedPlayer vs ControllerRef::You — both already
generically evaluated, no new runtime) and parse_cast_typed_spells_predicate
(the typed "cast <type> spells[. The same is true for <type> and <type>]"
sibling of the bare verb, mirroring same_is_true::parse_sentence's two-conjunct
continuation grammar for the type-changing family).

Fixes phase-rs#6077.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

* test(engine): Ward of Bones equal-count boundary regression guard

Adds the one case the existing per-type cast-prohibition suite (from
phase-rs#6095) never probes: P1 controls the SAME number of creatures as P0
(not strictly more). CR 109.4's "more than" is Comparator::GT (strict);
this guards against a silent regression to GE, which would wrongly
block casts on a tie.

Addresses the runtime-proof gap flagged in the (now-stale, commit
fb19028) review on PR phase-rs#6078 — the collapsed single-static approach
that review criticized was already replaced by phase-rs#6095's per-type
CantBeCast statics + integration tests during conflict resolution; this
closes the one boundary case those tests didn't yet cover.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

* fix(PR-6078): correct CR annotations

Co-authored-by: Full Stack Developer <topit89807@gmail.com>

---------

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
Co-authored-by: matthewevans <matthewevans@users.noreply.github.com>
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Ward of Bones: relative-quantity per-player cast prohibition + 'same is true' spell-type widening not parsed

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