The canonical spine of [[Stock_and_flow]]: its full tree-verified child structure, publishable to
Obsidian as the scaffold for route objects (microsims, songs, semiotics, cardsets, games,
streams, transcripts) keyed to this hub.
<!-- SIMGALLERY:BEGIN v1.0 g13 — generated iframe set; do not hand-edit inside -->
## Play every microsim on this page
<p class="microsim-gallery-note">Every microsim linked from this portal, embedded live. <strong>8 players</strong> — 3 threejs · 5 p5js.</p>
<ul class="microsim-gallery">
<li class="microsim-card" data-lib="threejs">
<iframe src="https://wikitube-3d-microsims.netlify.app/polytope4d.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Four-dimensional polytopes — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Four-dimensional polytopes</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/polytope4d.html" target="_blank" rel="noopener">open full-screen</a> · on <a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Three.js Microsim Master Class</a></div></div>
</li>
<li class="microsim-card" data-lib="threejs">
<iframe src="https://wikitube-3d-microsims.netlify.app/Klein_bottle.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Klein bottle — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Klein bottle</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Klein_bottle.html" target="_blank" rel="noopener">open full-screen</a> · on <a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Three.js Microsim Master Class</a></div></div>
</li>
<li class="microsim-card" data-lib="threejs">
<iframe src="https://wikitube-3d-microsims.netlify.app/Platonic_solid.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Platonic solids — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Platonic solids</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Platonic_solid.html" target="_blank" rel="noopener">open full-screen</a> · on <a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Three.js Microsim Master Class</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/90jeLsBsW" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Acoustic wave — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!P5_js_Microsim_Master_Class">Acoustic wave</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/90jeLsBsW" target="_blank" rel="noopener">open in the p5 editor</a> · on <a href="https://en.wikitube.io/wiki/WT!P5_js_Microsim_Master_Class">p5.js Microsim Master Class</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/tHGSVAofH" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Aliasing — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!P5_js_Microsim_Master_Class">Aliasing</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/tHGSVAofH" target="_blank" rel="noopener">open in the p5 editor</a> · on <a href="https://en.wikitube.io/wiki/WT!P5_js_Microsim_Master_Class">p5.js Microsim Master Class</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/HVNGd9nMv" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Histogram — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!P5_js_Microsim_Master_Class">Histogram</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/HVNGd9nMv" target="_blank" rel="noopener">open in the p5 editor</a> · on <a href="https://en.wikitube.io/wiki/WT!P5_js_Microsim_Master_Class">p5.js Microsim Master Class</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/QPai0xNyx" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Recurrence relation (p5.js) — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Recurrence_relation">Recurrence relation (p5.js)</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/QPai0xNyx" target="_blank" rel="noopener">open in the p5 editor</a> · on <a href="https://en.wikitube.io/wiki/Recurrence_relation">Recurrence relation</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/VG2lh_GDS" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="System dynamics — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/System_dynamics">System dynamics</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/VG2lh_GDS" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
</ul>
<!-- SIMGALLERY:END -->
<!-- CRAFT-LINK:START g12 -->
**Craft standard:** Both craft standards apply here — [[WT!Three_js_Microsim_Master_Class|three.js]] and [[WT!P5_js_Microsim_Master_Class|p5.js]].
<!-- CRAFT-LINK:END -->
<!-- SECTIONSIMS:BEGIN g34 2026-09-19 - microsims the articles linked here play; generated by _tools/generate/g34_portal_section_sims.py; do not hand-edit inside -->
*Microsims from the articles linked below:*
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Water_cycle.html" data-title="Water cycle"></div>
<!-- SECTIONSIMS:END -->
<!-- TREEGEN:BEGIN v1.4 src=_registry/linktree/Stock_and_flow.json harvested=2026-07-29T23:41:40Z children=73 — generated by g01_hub_portals.py; do not hand-edit inside this block -->
## Canonical link structure — 73 tree-verified children
Hub article: [[Stock_and_flow]] · tree harvested 2026-07-29T23:41:40Z · every entry below is in this hub's harvested
child tree (v09-gated). Unbuilt links are intentional forward-refs: the populate scaffold.
**A** — [[Accounting]] · [[Asset]]
**B** — [[Bathtub]] · [[Bioaccumulation]]
**C** — [[Cambridge_Journal_of_Economics]] · [[Capital_(economics)]] · [[Capital_accumulation]] · [[Carbon_cycle]] · [[Carbon_dioxide_removal]] · [[Climate_change_mitigation]] · [[Commensurability_(philosophy_of_science)]] · [[Conceptual_model]] · [[Conserved_quantity]]
**D** — [[Debt-to-GDP_ratio]] · [[Depreciation]] · [[Derivative]] · [[Digital_object_identifier]] · [[Dimensional_analysis]] · [[Dynamical_system]]
**E** — [[Earth's_energy_budget]] · [[Earth_system_science]] · [[Economics]] · [[Energy]] · [[Energy_homeostasis]] · [[Expense]]
**F** — [[Fixed_investment]] · [[Flow]]
**G** — [[Greenhouse_gas]] · [[Greenhouse_gas_emissions]] · [[Gross_domestic_product]]
**H** — [[Human_capital]]
**I** — [[Income]] · [[Integral]] · [[Intensive_and_extensive_properties]] · [[International_Encyclopedia_of_the_Social_Sciences]] · [[Inventory]] · [[Inventory_investment]] · [[Investment_(macroeconomics)]] · [[Irving_Fisher]]
**J** — [[Jay_Wright_Forrester]] · [[Joan_Robinson]] · [[JSTOR]]
**L** — [[Labour_economics]] · [[Labour_power]] · [[Liability_(financial_accounting)]]
**M** — [[Material]] · [[Means_of_production]] · [[Michał_Kalecki]] · [[Money]] · [[Money_supply]]
**N** — [[Net_investment]] · [[Nitrogen_cycle]]
**P** — [[Physical_capital]] · [[Pollutant]]
**Q** — [[Quantity_theory_of_money]]
**R** — [[Rate_(mathematics)]] · [[Recurrence_relation]] · [[Reservoir]] · [[Robert_W._Clower]]
**S** — [[Saving]] · [[Speed]] · [[State_variable]] · [[Stock-flow_consistent_model]] · [[Stock_(disambiguation)]] · [[Stoichiometry]] · [[Systems_thinking]] · [[System_dynamics]]
**T** — [[The_New_Palgrave_Dictionary_of_Economics]] · [[Time_derivative]]
**U** — [[Unit_of_measurement]]
**V** — [[Velocity_of_money]]
**W** — [[Water_cycle]] · [[Wealth]]
## Route objects (§10.3 stubs — placeholders declared in `_registry/firebase/`)
- **microsim** — `microsim/{library}/Stock_and_flow__{YYYYMMDD}T{HHMM}Z/`
- **songs** — `songs/{Band_name}/{Song_name}/Stock_and_flow/`
- **semiotics** — `semiotics/{authorizer}/{set}/{Song_name}/{audio_video_id}/Stock_and_flow/`
- **cardset** — `cardset/{authorizer}/{set}/Stock_and_flow/`
- **games** — `games/quizzes/Stock_and_flow/`
- **channel_stream** — `channel_stream/Stock_and_flow/`
- **transcripts** — `transcripts/{audio_video_id}/Stock_and_flow/`
Hub + children route keys are pre-declared in `_registry/firebase/expansion_matches.csv`
(54,000 Related Wikipedia Matches). Minting any leaf passes §10.1 registration.
<!-- TREEGEN:END -->
---
*Repopulated 2026-09-19 · append-only · source: _tools/generate/g34_portal_section_sims.py@36068b13 (players of the linked articles, each URL 200-checked) · 1 added · 0 deletions*