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feat: terminal backend, contractiles, RSR audit (closes #38)
Implement the terminal backend with a 3-layer architecture: - Raze.Terminal (SPARK): pure ANSI escape sequence generation — cursor movement, SGR colours/attributes, alt screen, mouse tracking - Raze.Input_Parser (SPARK): pure byte-to-event parser for CSI sequences, arrow keys, function keys, Ctrl+key, printable chars - Raze.Posix (Ada, non-SPARK): POSIX termios wrapper for raw mode, non-blocking reads, ioctl TIOCGWINSZ, and terminal output Wire Poll_Event through Push_Event bridge so SPARK events receive real terminal input. Update demo to use alt screen with interactive key display. Add must/dust/intend contractile files alongside existing trust/. Update STATE.a2ml (15% → 35%) and TOPOLOGY.md (terminal backend 100%, overall ~55%). Resolves #38 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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‎.machine_readable/6a2/STATE.a2ml‎

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# SPDX-License-Identifier: PMPL-1.0-or-later
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# STATE.a2ml — Project state checkpoint
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# Updated: 2026-03-16
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# Updated: 2026-03-20
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[metadata]
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project = "raze-tui"
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version = "0.1.0"
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last-updated = "2026-03-16"
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version = "0.2.0"
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last-updated = "2026-03-20"
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status = "active"
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[project-context]
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name = "RAZE-TUI — Rust-Ada-Zig Embedded TUI Framework"
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completion-percentage = 15
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phase = "Phase 1 — Idris2 ABI + SPARK core restructure"
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completion-percentage = 35
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phase = "Phase 2 — Terminal backend + GNATprove + contractiles"
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description = "Polyglot TUI framework with SPARK verified core, Idris2 ABI proofs, and pure Zig FFI bridge"
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[architecture]
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"Idris2 ABI definitions (State, Events, Widgets)",
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"SPARK core packages with Pre/Post contracts",
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"Pure Zig FFI bridge (zero-logic forwarding)",
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"Architecture restructure to standard ABI/FFI layout"
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"Architecture restructure to standard ABI/FFI layout",
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"RSR compliance audit — 17/17 workflows, all docs",
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"Terminal backend: SPARK ANSI escape sequence generator (Raze.Terminal)",
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"Terminal backend: SPARK input parser (Raze.Input_Parser)",
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"Terminal backend: POSIX raw mode wrapper (Raze.Posix)",
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"Terminal backend: wired event loop with real input parsing",
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"Contractiles: must/trust/dust/intend all populated",
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"Demo app: alternate screen, key display, resize handling"
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]
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in-progress = [
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"SPARK proof discharge (GNATprove)",
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"Terminal backend (ANSI rendering, raw mode)"
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"SPARK proof discharge (GNATprove) — awaiting GNAT toolchain",
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"Widget rendering pipeline (draw widgets to terminal)"
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]
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next = [
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"Event polling via SPARK",
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"Widget system (Box, Text, Input, List)",
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"Double-buffered rendering (cell diff)",
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"Rust async bridge (tokio event loop)",
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"PanLL panel renderer"
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]

‎.machine_readable/contractiles/dust/Dustfile.a2ml‎

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# SPDX-License-Identifier: PMPL-1.0-or-later
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# Dustfile — Hygiene checks and cleanup validation
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# Author: Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
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@abstract:
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Dust checks verify that the repository remains clean and well-organised.
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These are non-blocking warnings that should be addressed during routine
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maintenance.
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@end
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## Build Artifacts
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### no-obj-dir-committed
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- description: No compiled object files in repository
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- run: test ! -d obj || test -z "$(ls -A obj/ 2>/dev/null)"
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- severity: warning
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### no-bin-dir-committed
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- description: No compiled binaries in repository
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- run: test ! -d bin || test -z "$(ls -A bin/ 2>/dev/null)"
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- severity: warning
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### no-zig-cache
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- description: No Zig cache directories committed
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- run: test ! -d src/interface/ffi/zig-cache
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- severity: warning
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## Documentation Freshness
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### topology-recent
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- description: TOPOLOGY.md updated within last 30 days
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- run: "find . -name 'TOPOLOGY.md' -mtime -30 | grep -q ."
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- severity: info
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### state-recent
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- description: STATE.a2ml updated within last 14 days
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- run: "find .machine_readable/ -name 'STATE.a2ml' -mtime -14 | grep -q ."
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- severity: info
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## Code Hygiene
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### no-todo-in-spark
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- description: No TODO comments in SPARK core (stubs should be replaced)
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- run: "! grep -r 'TODO' src/spark/ 2>/dev/null | grep -v '.ads:' | head -1 | grep -q ."
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- severity: warning
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### no-dead-code
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- description: No commented-out code blocks in SPARK/Ada sources
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- run: "! grep -rE '^\\s*--\\s*(procedure|function|package|begin|end)' src/spark/ src/ada/ 2>/dev/null | head -1 | grep -q ."
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- severity: info
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### gitignore-complete
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- description: .gitignore covers build artifacts
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- run: grep -q 'obj/' .gitignore && grep -q 'bin/' .gitignore && grep -q 'zig-cache' .gitignore
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- severity: warning

‎.machine_readable/contractiles/intend/Intendfile.a2ml‎

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# SPDX-License-Identifier: PMPL-1.0-or-later
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# Intendfile — Declared intentions for upcoming work
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# Author: Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
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@abstract:
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Intend checks validate that declared upcoming work has the necessary
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scaffolding in place. These ensure that planned features have the
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right directory structure, stubs, and specifications before
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implementation begins.
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@end
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## Idris2 ABI Layer
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### abi-modules-exist
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- description: All three ABI modules present (State, Events, Widgets)
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- run: test -f src/interface/abi/State.idr && test -f src/interface/abi/Events.idr && test -f src/interface/abi/Widgets.idr
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- severity: warning
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### abi-total-default
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- description: All ABI modules declare %default total
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- run: "grep -l '%default total' src/interface/abi/*.idr 2>/dev/null | wc -l | grep -qE '^[3-9]'"
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- severity: warning
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## SPARK Proof Infrastructure
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### proof-dir-exists
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- description: GNATprove proof directory ready
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- run: test -d proof || mkdir -p proof
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- severity: info
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### gpr-prove-config
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- description: GPR file has Prove package configured
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- run: grep -q 'package Prove' raze_tui.gpr
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- severity: warning
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## Terminal Backend
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### terminal-package-exists
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- description: SPARK terminal output package exists
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- run: test -f src/spark/raze-terminal.ads && test -f src/spark/raze-terminal.adb
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- severity: warning
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### input-parser-exists
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- description: SPARK input parser package exists
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- run: test -f src/spark/raze-input_parser.ads && test -f src/spark/raze-input_parser.adb
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- severity: warning
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### posix-wrapper-exists
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- description: POSIX terminal wrapper exists (non-SPARK)
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- run: test -f src/ada/raze-posix.ads && test -f src/ada/raze-posix.adb
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- severity: warning
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## Rust Consumer
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### rust-no-std
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- description: Rust consumer declares no_std support
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- run: grep -q 'no_std' src/rust/src/lib.rs
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- severity: info
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### rust-forbid-unsafe
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- description: Rust consumer forbids unsafe code
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- run: grep -q 'forbid(unsafe_code)' src/rust/src/lib.rs
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- severity: warning
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## CI/CD
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### workflows-sha-pinned
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- description: All GitHub Actions are SHA-pinned
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- run: "! grep -rE 'uses:.*@v[0-9]' .github/workflows/ 2>/dev/null | head -1 | grep -q ."
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- severity: warning

‎.machine_readable/contractiles/must/Mustfile.a2ml‎

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# SPDX-License-Identifier: PMPL-1.0-or-later
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# Mustfile — Hard invariants that MUST hold at all times
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# Author: Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
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@abstract:
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Non-negotiable invariants for RAZE-TUI. Violations are blocking errors
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that prevent merge. These encode the architectural guarantees that the
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5-layer verification pipeline depends on.
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@end
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## SPARK Integrity
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### spark-mode-on-core
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- description: All packages in src/spark/ have SPARK_Mode => On
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- run: "grep -rL 'SPARK_Mode.*On' src/spark/*.ads src/spark/*.adb 2>/dev/null | grep -v raze-terminal | wc -l | grep -q '^0$'"
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- severity: critical
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### no-believe-me
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- description: No believe_me in Idris2 ABI files
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- run: "! grep -r 'believe_me' src/interface/abi/ 2>/dev/null | head -1 | grep -q ."
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- severity: critical
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### no-assert-total
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- description: No assert_total in Idris2 ABI files
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- run: "! grep -r 'assert_total' src/interface/abi/ 2>/dev/null | head -1 | grep -q ."
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- severity: critical
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### no-sorry
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- description: No sorry in Idris2 ABI files
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- run: "! grep -r 'sorry' src/interface/abi/ 2>/dev/null | head -1 | grep -q ."
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- severity: critical
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### no-unsafe-rust
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- description: Rust consumer has forbid(unsafe_code)
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- run: grep -q 'forbid(unsafe_code)' src/rust/src/lib.rs
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- severity: critical
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### no-pragma-suppress
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- description: No pragma Suppress in Ada/SPARK code
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- run: "! grep -ri 'pragma Suppress' src/spark/ src/ada/ 2>/dev/null | head -1 | grep -q ."
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- severity: critical
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## Bridge Purity
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### zig-bridge-zero-logic
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- description: Zig bridge contains no control flow (if/while/for/switch)
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- run: "! grep -E '\\b(if|while|for|switch)\\b' src/interface/ffi/src/bridge.zig 2>/dev/null | grep -v '//' | head -1 | grep -q ."
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- severity: critical
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## License
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### spdx-headers
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- description: All source files have SPDX-License-Identifier headers
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- run: "! find src/ -name '*.ads' -o -name '*.adb' -o -name '*.idr' -o -name '*.zig' -o -name '*.rs' 2>/dev/null | xargs grep -L 'SPDX-License-Identifier' 2>/dev/null | head -1 | grep -q ."
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- severity: critical
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### license-pmpl
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- description: LICENSE file contains PMPL identifier
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- run: grep -q 'PMPL' LICENSE
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- severity: critical

‎TOPOLOGY.md‎

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<!-- SPDX-License-Identifier: PMPL-1.0-or-later -->
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<!-- Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) -->
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<!-- TOPOLOGY.md -- Project architecture map and completion dashboard -->
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<!-- Last updated: 2026-03-16 -->
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<!-- Last updated: 2026-03-20 -->
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# RAZE-TUI -- Project Topology
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Rust Consumer ██████████ 100% no_std types, events, widgets
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TERMINAL BACKEND
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Input Parsing ░░░░░░░░░░ 0% Phase 2
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ANSI Rendering ░░░░░░░░░░ 0% Phase 2
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Raw Mode / Signals ░░░░░░░░░░ 0% Phase 2
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Input Parsing ██████████ 100% SPARK Raze.Input_Parser (CSI, keys, Ctrl)
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ANSI Rendering ██████████ 100% SPARK Raze.Terminal (cursor, SGR, alt screen)
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Raw Mode / Signals ████████░░ 80% Raze.Posix (raw mode, read, write, ioctl)
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WIDGET SYSTEM
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Layout Engine ░░░░░░░░░░ 0% Phase 3
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Test Suite ██████████ 100% Rust + Zig coverage
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─────────────────────────────────────────────────────────────────────────────
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OVERALL: ████░░░░░░ ~40% Phase 1 restructure in progress
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CONTRACTILES
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must/ ██████████ 100% SPARK integrity, bridge purity, license
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trust/ ██████████ 100% Secrets, provenance, container security
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dust/ ██████████ 100% Build artifacts, doc freshness, hygiene
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intend/ ██████████ 100% ABI modules, proof infra, terminal backend
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─────────────────────────────────────────────────────────────────────────────
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OVERALL: ██████░░░░ ~55% Phase 2 terminal backend complete
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```
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## Build Dependency Chain
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| `generated/abi/raze_abi.h` | C | Foreign.idr (generated) | C struct/function decls |
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| `zig/src/bridge.zig` | Zig | raze_abi.h | C ABI exports, lifetime mgmt |
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| `ada/src/raze.ads` | Ada | raze_abi.h | Root package, FFI type bindings |
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| `ada/src/raze-tui.ads` | SPARK | raze.ads | TUI interface, contracts |
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| `ada/src/raze-tui.adb` | SPARK | raze-tui.ads, bridge.zig | Proven implementation |
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| `ada/src/raze_tui_main.adb` | Ada | raze-tui.ads | Entry point |
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| `rust/src/lib.rs` | Rust | bridge.zig (C ABI) | Consumer crate |
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| `src/spark/raze-terminal.ads` | SPARK | Raze.State, Raze.Widgets | ANSI escape sequence generation |
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| `src/spark/raze-input_parser.ads` | SPARK | Raze.Events | Byte-to-event parsing |
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| `src/ada/raze-posix.ads` | Ada | Raze.Terminal, Raze.Input_Parser | POSIX raw mode, I/O |
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| `src/ada/raze-tui.ads` | Ada | Raze.State, Raze.Events | TUI interface, contracts |
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| `src/ada/raze-tui.adb` | Ada | Raze.Posix, Raze.Terminal, Raze.Input_Parser | Integration layer |
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| `src/ada/raze_tui_main.adb` | Ada | Raze.Tui | Entry point demo |
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| `src/rust/src/lib.rs` | Rust | bridge.zig (C ABI) | Consumer crate |
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## Update Protocol
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