Add initial project structure, including README, CONTRIBUTING, and documentation files

- Created .gitignore to exclude unnecessary files - Added README.md with project description and core features - Introduced CONTRIBUTING.md for development guidelines - Established documentation files for architecture, quality requirements, and technical risks
2026-05-17 15:50:43 +02:00
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+# Quality Requirements
+
+Content
+
+This section contains all relevant quality requirements.
+
+The most important of these requirements have already been described in
+section 1.2. (quality goals), therefore they should only be referenced
+here. In this section 10 you should also capture quality requirements
+with lesser importance, which will not create high risks when they are
+not fully achieved (but might be _nice-to-have_).
+
+Motivation
+
+Since quality requirements will have a lot of influence on architectural
+decisions you should know what qualities are really important for your
+stakeholders, in a specific and measurable way.
+
+Further Information
+
+- See [Quality Requirements](10_quality_requirements.md) in the
+  arc42 documentation.
+
+- See the extensive [Q42 quality model on
+  <https://quality.arc42.org>](https://quality.arc42.org).
+
+## Quality Requirements Overview
+
+Content
+
+An overview or summary of quality requirements.
+
+Motivation
+
+Often we encounter dozens (or even hundreds) of detailed quality
+requirements. In this overview section you should try to summarize, e.g.
+by describing categories or topics (as suggested by [ISO
+25010:2023](https://www.iso.org/obp/ui/#iso:std:iso-iec:25010:ed-2:v1:en)
+or [Q42](https://quality.arc42.org))
+
+If these summary descriptions are already precise, specific enough and
+measurable, you may skip section 10.2.
+
+Form
+
+Use a simple table in which each line contains a category or topic and a
+short description of the quality requirement. Alternatively, you may use
+a mindmap to structure these quality requirements. In literature, the
+idea of a _quality attribute tree_ has also been described, which puts
+the generic term "quality" as the root and uses a tree-like refinement
+of the term "quality". \[Bass+21\] introduced the term "Quality
+Attribute Utility Tree" for this purpose.
+
+## Quality Scenarios
+
+Content
+
+Quality scenarios make quality requirements concrete and allow to decide
+whether they are fulfilled (in the sense of acceptance criteria). Ensure
+that your scenarios are specific and measurable.
+
+Two kinds of scenarios are especially useful:
+
+- _Usage scenarios_ (also called application scenarios or use case
+  scenarios) describe the system’s runtime reaction to a certain
+  stimulus. This also includes scenarios that describe the system’s
+  efficiency or performance. Example: The system reacts to a user’s
+  request within one second.
+
+- _Change scenarios_ describe the desired effect of a modification or
+  extension of the system or of its immediate environment. Example:
+  Additional functionality is implemented or requirements for a quality
+  attribute change, and the effort or duration of the change is
+  measured.
+
+Form
+
+Typical information for detailed scenarios include the following:
+
+In short form (favoured in the Q42 model):
+
+- **Context/Background**: What kind of system or component, what is the
+  envirionment or situation?
+
+- **Source/Stimulus**: Who or what initiates or triggers a behaviour,
+  reaction or action.
+
+- **Metric/Acceptance Criteria**: A response including a _measure_ or
+  _metric_
+
+The long form of scenarios (favoured by the SEI and \[Bass+21\]) is more
+detailed and includes the following information:
+
+- **Scenario ID**: A unique identifier for the scenario.
+
+- **Scenario Name**: A short, descriptive name for the scenario.
+
+- **Source**: The entity (user, system, or event) that initiates the
+  scenario.
+
+- **Stimulus**: The triggering event or condition the system must
+  address.
+
+- **Environment**: The operational context or condition under which the
+  system experiences the stimulus.
+
+- **Artifact**: The building-blocks or other elements of the system
+  affected by the stimulus.
+
+- **Response**: The outcome or behavior the system exhibits in reaction
+  to the stimulus.
+
+- **Response Measure**: The criteria or metric by which the system’s
+  response is evaluated.
+
+Examples
+
+See [the Q42 quality model website](https://quality.arc42.org) for
+detailed examples of quality requirements.
+
+Further Information
+
+- Len Bass, Paul Clements, Rick Kazman: "Software Architecture in
+  Practice", 4th Edition, Addison-Wesley, 2021.
+
+## Project-Specific Scenarios
+
+| Quality          | Scenario                                            | Priority | Current Gap                               |
+| ---------------- | --------------------------------------------------- | -------- | ----------------------------------------- |
+| Availability     | Bot must handle 100+ concurrent users during events | High     | Not yet load-tested                       |
+| Responsiveness   | Slash commands respond within 2s                    | High     | Baseline OK; need perf testing under load |
+| Data consistency | Mileage not lost on crash or restart                | High     | Write-ahead logging not yet implemented   |
+| Security         | No token leakage via logs or error messages         | Critical | Pass — tokens env-only                    |
+| Extensibility    | Add new content source in ≤2 days work              | Medium   | Adapter pattern defined, not yet coded    |
+
+## Nice-to-Have
+
+| Quality            | Scenario                                     |
+| ------------------ | -------------------------------------------- |
+| Localization       | Embeds and messages in multiple languages    |
+| Accessibility      | Dashboard UI meets WCAG 2.1 AA               |
+| Offline resilience | Bot caches last hour of events on local disk |