# Chanora Requirements and Design Traceability Matrix

**Version:** 0.9.2
**Status:** Baseline Candidate  
**Language:** English  
**Product:** Chanora  
**Lifecycle hierarchy:** `SysRS -> SysDes -> SRS -> SAD -> SDD`

**Repo path:** `docs/governance/traceability-matrix.md`  ---

## 1. Strict Hierarchy

The Chanora documentation hierarchy shall follow this structure strictly:

```text
SysRS -> SysDes -> SRS -> SAD -> SDD
```

Direct-source rules:

| Document | Direct upstream source allowed |
|---|---|
| SysDes | SysRS |
| SRS | SysDes only |
| SAD | SRS only |
| SDD | SAD only |

Prohibited direct links:

| Document | Prohibited direct source |
|---|---|
| SRS | SysRS |
| SAD | SysRS, SysDes |
| SDD | SysRS, SysDes, SRS |

## 2. Current Baseline Documents

| Layer | Current baseline | ID range |
|---|---|---|
| SysRS | `chanora_SysRS_v0.7.md` | SysRS-001 through SysRS-285 |
| SysDes | `chanora_SysDes_ASPICE_SYS3_v0.6.md` | SysDes-001 through SysDes-132 |
| SRS | `chanora_SRS_ASPICE_SWE1_v0.5.md` | SRS-001 through SRS-184 |
| SAD | `chanora_SAD_ASPICE_SWE2_v0.3.md` | SAD-001 through SAD-060 |
| SDD | `chanora_SDD_ASPICE_SWE3_v0.3.md` | SDD-001 through SDD-070 |

## 3. Coverage Rules

| Upstream layer | Downstream layer | Coverage rule |
|---|---|---|
| SysRS | SysDes | SysRS shall be fully covered by SysDes. |
| SysDes | SRS | Software-team-related SysDes items shall be fully covered by SRS. |
| SRS | SAD | SAD shall cover all SRS items. |
| SAD | SDD | SDD shall cover all SAD items. |

## 4. Baseline Coverage Summary

| Source | Target |
|---|---|
| SysRS-001 through SysRS-257 | SysDes-001 through SysDes-110 |
| SysRS-258 through SysRS-285 | SysDes-111 through SysDes-132 |
| SysDes-001 through SysDes-110 | SRS-001 through SRS-143 |
| SysDes-111 through SysDes-132 | SRS-144 through SRS-184 |
| SRS-001 through SRS-030 | SAD-032, SAD-039, SAD-040, SAD-041 |
| SRS-031 through SRS-060 | SAD-033, SAD-039, SAD-041 |
| SRS-061 through SRS-090 | SAD-034, SAD-039, SAD-041 |
| SRS-091 through SRS-110 | SAD-035 |
| SRS-111 through SRS-124 | SAD-036, SAD-050 |
| SRS-125 through SRS-134 | SAD-037, SAD-049 |
| SRS-135 through SRS-143 | SAD-038 |
| SRS-144 through SRS-184 | SAD-001 through SAD-031, SAD-039 through SAD-060 |
| SAD-001 through SAD-007 | SDD-001 through SDD-010 |
| SAD-008 through SAD-011 | SDD-011 through SDD-015 |
| SAD-012 through SAD-016 | SDD-016 through SDD-026 |
| SAD-017 through SAD-019 | SDD-027 through SDD-030 |
| SAD-020 through SAD-027 | SDD-031 through SDD-041 |
| SAD-028 through SAD-031 | SDD-042 through SDD-045 |
| SAD-032 through SAD-038 | SDD-046 through SDD-050 |
| SAD-039 through SAD-045 | SDD-046 through SDD-050, SDD-055, SDD-056 |
| SAD-046 through SAD-050 | SDD-051 through SDD-058, SDD-061 |
| SAD-051 through SAD-060 | SDD-057 through SDD-070 |

## 5. Change Impact Rules

| Changed layer | Required impact analysis |
|---|---|
| SysRS | Review SysDes coverage; update SRS only through updated SysDes. |
| SysDes | Review affected SRS requirements; SRS shall not bypass SysDes. |
| SRS | Review affected SAD items; SAD shall link only to SRS. |
| SAD | Review affected SDD items; SDD shall link only to SAD. |
| SDD | Review implementation, unit construction, and verification evidence. |

## 6. Traceability Verification Checklist

| Check | Expected result |
|---|---|
| SysDes references SysRS | Allowed |
| SRS references SysRS | Not allowed |
| SRS references SysDes | Required |
| SAD references SRS | Required |
| SAD references SysRS or SysDes | Not allowed |
| SDD references SAD | Required |
| SDD references SysRS, SysDes, or SRS | Not allowed |
| Latest SAD ID range | SAD-001 through SAD-060 |
| Latest SDD ID range | SDD-001 through SDD-070 |


## 8. Verification Work Product Traceability

Verification work products are downstream evidence-producing artifacts. They do not change the strict engineering hierarchy.

| Verification document | Direct verification source | Coverage |
|---|---|---|
| `chanora_SWE4_Unit_Verification_Plan_v0.1.md` | SDD | SDD-001 through SDD-070 |
| `chanora_SWE5_Software_Integration_Verification_Plan_v0.1.md` | SAD and SDD | SAD-001 through SAD-060 and SDD-001 through SDD-070 |
| `chanora_SWE6_Software_Verification_Plan_v0.1.md` | SRS | SRS-001 through SRS-184 |
| `chanora_SYS4_System_Integration_Verification_Plan_v0.1.md` | SysDes | SysDes-001 through SysDes-132 |
| `chanora_Verification_Master_Plan_v0.1.md` | Verification planning baseline | SWE.4, SWE.5, SWE.6, SYS.4 |

## 9. Verification Change Impact

| Changed artifact | Verification impact |
|---|---|
| SDD | Re-select SWE.4 unit verification measures and affected SWE.5 integration measures. |
| SAD | Update SDD if needed and re-select affected SWE.5 integration measures. |
| SRS | Update SAD/SDD if needed and re-select affected SWE.6 verification measures. |
| SysDes | Update downstream engineering artifacts if needed and re-select affected SYS.4 measures. |
| SysRS | Update SysDes and downstream artifacts if requirements intent changes. |


## 10. Change History

| Version | Date | Description |
|---|---|---|
| 0.1.0 | 2026-05-14 | Initial strict traceability matrix. |
| 0.2.0 | 2026-05-14 | Updated current baseline to SAD v0.3 and SDD v0.3, with SAD-001 through SAD-060 and SDD-001 through SDD-070 coverage. |
| 0.3.0 | 2026-05-14 | Added downstream verification work product traceability for SWE.4, SWE.5, SWE.6, and SYS.4. |

---

## 11. Product Decision Traceability Addendum

| Source | Target |
|---|---|
| SysRS-286 through SysRS-295 | SysDes-133 through SysDes-141 |
| SysDes-133 through SysDes-141 | SRS-185 through SRS-194 |
| SRS-185 through SRS-194 | SAD-061 through SAD-070 |
| SAD-061 through SAD-070 | SDD-071 through SDD-080 |
| SDD-071 through SDD-080 | SWE.4 addendum SWE4-UV-031 through SWE4-UV-034 |
| SAD-061 through SAD-070 and SDD-071 through SDD-080 | SWE.5 addendum SWE5-IV-014 |
| SRS-185 through SRS-194 | SWE.6 addendum SWE6-SV-016 |
| SysDes-133 through SysDes-141 | SYS.4 addendum SYS4-SIV-015 |


## Baseline Candidate 0.9.1 Update

| Version | Date | Description |
|---|---|---|
| 0.9.1 | 2026-05-14 | Updated baseline after product decision closure: Apple App Store SDK gate uses Xcode 26+ and iOS 26 / iPadOS 26 SDK+ since 2026-04-28, platform baselines and decision traceability propagated across the document set. |

---

## 12. Platform Release Policy Traceability

| Policy document | Covered decisions |
|---|---|
| `docs/release/platform-release-policy.md` | iOS runtime target, Apple App Store Connect upload SDK gate, Android runtime target, Google Play target API gate |

The Apple App Store Connect upload gate remains linked through:

```text
SysRS-287 -> SysDes-134 -> SRS-186 -> SAD-062 -> SDD-072
```

The corrected effective date is:

```text
Since 2026-04-28:
App Store Connect upload builds require Xcode 26 or later
using iOS 26 / iPadOS 26 SDK or later.
```

This build-SDK gate is separate from the iOS runtime deployment target.


## Baseline Candidate 0.9.2 Update

| Version | Date | Description |
|---|---|---|
| 0.9.2 | 2026-05-14 | Corrected Apple App Store Connect upload gate to 2026-04-28 and checked full-package naming, references, and coverage. |


## Desktop Push-to-Talk Traceability Addendum (Baseline Candidate 0.9.3)

Strict layered sourcing for the desktop PTT chain:

```text
SysRS-296..302
  -> SysDes-142..148
  -> SRS-195..203
  -> SAD-071..079
  -> SDD-081..092
```

| SysRS | SysDes | SRS | SAD | SDD |
|---|---|---|---|---|
| SysRS-296 (Focused PTT mandatory) | SysDes-142, SysDes-144 | SRS-201 | SAD-075 | SDD-089 |
| SysRS-297 (Global PTT capability-dependent) | SysDes-142 | SRS-195 | SAD-071 | SDD-081 |
| SysRS-298 (Capability exposed) | SysDes-143, SysDes-147, SysDes-148 | SRS-196 | SAD-076, SAD-078 | SDD-082, SDD-088, SDD-091 |
| SysRS-299 (Windows ladder) | SysDes-145 | SRS-197 | SAD-072 | SDD-083, SDD-084 |
| SysRS-300 (macOS permission-aware) | SysDes-145 | SRS-198 | SAD-073 | SDD-085 |
| SysRS-301 (Linux GNOME-Wayland) | SysDes-145 | SRS-199 | SAD-074 | SDD-086 |
| SysRS-302 (No raw key history) | SysDes-146 | SRS-202 | SAD-077 | SDD-090 |
| (DEC-026 mouse buttons) | SysDes-142, SysDes-145 | SRS-200 | SAD-072..074 | SDD-082..086 |
| (DEC-028 missed-key-up watchdog) | SysDes-142, SysDes-144 | SRS-203 | SAD-079 | SDD-092 |

Verification coverage:

```text
SDD-081..092 -> SWE4-UV-035..039
SAD-071..079 + SDD-081..092 -> SWE5-IV-015
SRS-195..203 -> SWE6-SV-017
SysDes-142..148 -> SYS4-SIV-016
```

No forbidden direct links introduced: SRS continues to source from SysDes only, SAD from SRS only, SDD from SAD only.

| Version | Date | Description |
|---|---|---|
| 0.9.3 | 2026-05-15 | Added desktop PTT traceability rows covering SysRS-296..302 -> SysDes-142..148 -> SRS-195..203 -> SAD-071..079 -> SDD-081..092 and the verification coverage onto SWE.4 / SWE.5 / SWE.6 / SYS.4. |