OPL-Lang

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📌 Change Log – OPL‑Lang v1.0.0‑rc6

Release Date: 2025‑05‑24
Compared to: v1.0.0‑rc3

Clarified DSL scope as covering hybrid stock + option strategies.
Strengthened wording: “not a pricing engine” made explicit.
Adjusted formatting and consistency across all section headers and syntax blocks.

➕ New Features & Input Extensions

Added price_target and vol_target as optional exit/funding inputs.
Introduced support for relative strike and tenor (e.g. +5%, ‑30d).
Glossary updated with K, T, L, Q control parameters.

⚙️ Engine Behavior & Constraint Clarification

Stock / ETF / Future defined to contribute only Δ = ±1; other Greeks are zero.
Engines MUST handle contract multiplier logic explicitly (1 option = 100 shares).
Clarified when shift_strike and roll_tenor are NOP for linear legs.
MapIntentToO may include linear instruments when vega exposure is not needed.

🧠 Control & Risk Logic Updates

Added control_tune() post-solve step to Path C (previously only implied).
Refined canonicalisation of Breakout and RangeBound intents.
Reinforced max_risk precedence over premium_offset; warning W403 mentioned as degraded offset behavior.

🧪 Golden Samples Expanded

2 new strategy examples:
- scale_qty() doubling a position.
- Classic covered call example.

📐 Grammar & Validation

Added grammar rules for RelNUMBER, RelTIME to support relative strike/tenor.
New validation codes:
- E304 (lot-size mismatch)
- E305 (zero/negative quantity)
- W403 (premium offset degraded)

See full release: opl-lang-spec-en-v1.0.0-rc6.md
Previous version: v1.0.0-rc3

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